This could confuse you because 0 is also the value of FALSE. Why is char[] preferred over String for passwords? Strings can be compared either by using the string function or without using string function. Subscribe through email. How can I do this? First, we will look at how we can compare the strings with the help of string function, i.e., strcmp(), which is defined in a string.h header file. Strings to be compared are sent as arguments to cmpstr (). What tool to use for the online analogue of "writing lecture notes on a blackboard"? Comparing strings requires a special function; do not use != or ==. Instead of having a 2-Dimensional character array, we can have a single-dimensional array of Pointers. 2. Code snippets
You would use the static String.Compare methods to specify different comparison rules. Interview que. strcmp () compares two given input string. Vector of Vectors in C++ STL with Examples, Tree Traversals (Inorder, Preorder and Postorder). In this example, we declare two strings string1 and string2. 2 What does the exclamation mark mean in JavaScript? The 'a' pointer holds the address of str1 and 'b' pointer holds the address of str2. Lexicographical order is the order in which words appear in the order of a dictionary. Is there a method to compare these strings to each other without looping through them in C# such that only a and c would yield the boolean true? Is there a more recent similar source? This is only usable in C++, as C does not have classes. Remove empty elements from an array in Javascript. Python
These are often used to create meaningful and readable programs. A Binary Search Tree is a special type of Binary Tree that contains a maximum of 2 nodes (like all Binary Trees) with one big difference - the values are set so that the left children must be smaller than the parent, the right children . Here, we will build a C Program to compare two strings lexicographically. The 4 may be omitted, and the compiler will compute the correct size. LinkedIn
https://www.includehelp.com some rights reserved. & ans. C++ offers several container classes, each of which has various tradeoffs and features, and all of them exist to fill requirements that you will have in your projects. A single Relational operator is unique to a certain operation, while compare() can perform lots of different operations alone, based on the type of arguments passed. strcmp () - This function compares two strings and returns the comparative difference in the number of characters. C
Version 1 The first array is created with an initialization statement. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. 4. I wanted to compare how many strings both arrays have in common and also if the array contains a certain string. By signing up you are agreeing to receive emails according to our privacy policy. We can use the strcmp () function to compare a Char Array with an empty string. C
The number of distinct words in a sentence. This cookie is set by GDPR Cookie Consent plugin. The strings are also mutable, allowing them to be changed. I have a graph with two vertices, and each contain a property named interests, which is an array of strings. Auxiliary Space: O(max(n,m)) where n and m are the length of the strings. If lengths of two strings are equal then only we can compare the strings. To compare and return True if two string arrays are equal, use the numpy.char.equal () method in Python Numpy. In this problem, we are given an array of string. Suspicious referee report, are "suggested citations" from a paper mill? Not the answer you're looking for? A string is a 1-dimensional array of characters and an array of strings is a 2-dimensional array of characters. A single Relational operator is unique to a certain operation, while compare () can perform lots of different operations alone, based on the type of arguments passed. First let us see the simpler approach of using pre-defined C functions. Instead, to determine whether two strings are equal, use the String.Equals (String, String, StringComparison) method. How can I recognize one? I have filled up these two arrays with names and now I must compare for example, the first element of arrs and the third element of arrj. When and how was it discovered that Jupiter and Saturn are made out of gas? mat) with two vectors (VarNames1=Dates and VarNames2=Prices). "Without looping" is handy when you need to construct an Expression
>. For example: The string hello world contains 12 characters including \\0 character which is automatically added by the compiler at the end of the string. What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence? Given 2 strings s1 and s2, of lowercase English alphabets, denote the lexicographically greater string. It is defined under h library. If the function returns 0, which means that both the strings are equal otherwise both the strings are not equal. Connect and share knowledge within a single location that is structured and easy to search. This is because when string is passed in the function it creates a copy of itself in stack. Below are the 5 different ways to create an Array of Strings in C++: Using Pointers Using 2-D Array Using the String Class Using the Vector Class Using the Array Class 1. C++
My goal is to check if the corresponding elements are equal. The string function which is pre-defined in a string.h header file is a strcmp() function. String comparison in C also possible by using pointers. Launching the CI/CD and R Collectives and community editing features for How can I concatenate two arrays in Java? Note that the initializer-list syntax here requires a compiler that supports the 2011 C++ standard, and though it is quite likely your compiler does, it is something to be aware of. With arrays, why is it the case that a[5] == 5[a]? So, to avoid high space consumption in our program we can use an Array of Pointers in C. We cant directly change or assign the values to an array of strings in C. Here, arr[0] = GFG; // This will give an Error which says assignment to expression with an array type. If they are equal to each other, it continues with the following pairs until the characters differ or until a terminating null-character is reached. Look at extension method sig for details. We take the user input as strings. News/Updates, ABOUT SECTION
We take the user input as strings. A million pointers in each array of arrays?. The strcmp function compares the string s1 against s2, returning a value that has the same sign as the difference between the first differing pair of bytes (interpreted as unsigned char objects, then promoted to int ). Is it important to have a college degree in today's world. Here are the functions which we designed to read, print and compare arrays. How to print size of array parameter in C++? This method returns true if all values are the same in two arrays and returns false if contents are not the same. & ans. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Auxiliary Space: O(max(n,m)) where n and m are the length of the strings. */) in_array () Another way is to use the function in_array () and check if the value is equal to one of the array values: if (in_array ($ext, ["txt", "rtf" /* , . Time Complexity: O(min(n,m)) where n and m are the length of the strings. Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. as in example? I see. The 4, again, may be left out, and the appropriate size will be computed by the compiler. All tip submissions are carefully reviewed before being published. You should remove * first, and also define index as much as you need, dont use that much first. JavaScript
How to Use GCC to Compile a C Program on Linux and Windows, How to Compare Two Strings in C Programming, http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1057537653&id=1043284385, Confrontare due Stringhe nel Linguaggio C, C, Bei der Programmierung in C zwei Zeichenketten vergleichen, comparer deux chaines de caractres en langage C, Membandingkan Dua String dalam Pemrograman C, Twee tekenreeksen vergelijken in de programmeertaal C. As discussed in previous tutorials of Strings in C language are nothing but a series of characters followed by a null byte('\0'). Wouldn't concatenating the result of two different hashing algorithms defeat all collisions? Possible return values from the strcmp() function. This C program is used to compare two strings by using strcmp () function. Necessary cookies are absolutely essential for the website to function properly. How to increase the number of CPUs in my computer? Of course it's impossible to compare multiple items without looping. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How can I do this? This function will compare both the strings str1 and str2. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Applications of super-mathematics to non-super mathematics. In order words, list out the common values present in each of the arrays. SEO
By using our site, you Thanks, probably won't use that this time, but it is a nifty option. Method 1: Write a function to sort the array and instead of comparing the values of the characters, compare their ASCII values % M to sort the array. What is the different between strcmp and strncmp? @TimSchmelter: Yeah, I realize that a loop is being executed behind the scenes, I just wanted something neat and pretty-looking without room for a muck up. strcmp(string1, string2) == 0 means if it's true, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. @WesField: Note that this method also loops, just because your requirement was. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Privacy policy, STUDENT'S SECTION
Keep up with the latest tech with wikiHow's free Tech Help Newsletter. If the element in B is diferent from A I want to save that element in a new array C and use a counter to count every element that is diferent from A. Input: s1 = "geeks", s2 = "geeksforgeeks Output: A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. A string is a group of characters and the direct comparison of two strings is not possible in C. The two strings to be checked must be compared character by character. Java
An array is a homogeneous mixture of data that is stored continuously in the memory space. 2) First, check the lengths of two strings. Updated on December 14, 2022, Simple and reliable cloud website hosting, "\nString 1 is smaller as compared to String 2. Thanks to all authors for creating a page that has been read 514,070 times. In the syntax above, two arguments, str1 and str2, are passed as strings and the return type is int, indicating that strcmp() gives an integer value. An extension method is just a static method in a static class. Why "&" is not used for strings in scanf() function? In this program we will read two one dimensional arrays of 5 elements and compare them. We then use the String.Equals() method to compare them, passing the StringComparison.OrdinalIgnoreCase option. Habib Mar 12 at 19:11 Compares the C string str1 to the C string str2. An array of arrays of pointers to char? These cookies track visitors across websites and collect information to provide customized ads. Then it compares the lenght of the two and then cycles through the smaller one, removing all matches from the bigger one, thus leaving only the different values. cmpstr () is a function that illustrates C standard function strcmp (). Sometimes, control over the memory footprint is desirable, and this will allocate a region of memory with a fixed, regular layout. parseValue(value); }; const parseValue = (value: string) => { // . By using our site, you agree to our. Generally Accepted Accounting Principles MCQs, Marginal Costing and Absorption Costing MCQs, Run-length encoding (find/print frequency of letters in a string), Sort an array of 0's, 1's and 2's in linear time complexity, Checking Anagrams (check whether two string is anagrams or not), Find the level in a binary tree with given sum K, Check whether a Binary Tree is BST (Binary Search Tree) or not, Capitalize first and last letter of each word in a line, Greedy Strategy to solve major algorithm problems, Do's and Don'ts For Dressing Up For Interviews, 20 Smart Questions To Ask During An Interview, Common Body Language Mistakes to Avoid During Interviews. I pray these aren't automatic variables in some function. Learn more, 1. 1. Strcmp() simply compares two strings; strncmp() compares the first n characters of two string together. NSArray. The strcmp() function consider two strings as a parameter, and this function returns an integer value where the integer value can be zero, positive or negative. Java
Merge arrays Bubble sort in C Insertion sort in C Selection sort in C Add matrices Subtract matrices Transpose matrix Matrix multiplication in C Print string String length Compare strings DBMS
This website uses cookies to improve your experience while you navigate through the website. By clicking Accept All, you consent to the use of ALL the cookies. Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? This function performs a binary comparison of the characters. Each column must be a separate PDL or an ARRAY ref. DS
What is the difference between String and string in C#? How do I make the first letter of a string uppercase in JavaScript? Each String is terminated with a null character (\0). Returns 0, When both strings are exactly the same. Syntax: char variable_name [r] = {list of string}; Here, strcmp () function compares two strings lexicographically, and it's declared in stdio.h. It does not store any personal data. ", New! How did Dominion legally obtain text messages from Fox News hosts? Cloud Computing
What are some tools or methods I can purchase to trace a water leak? "Hi", "Hello", and e.t.c are examples of String. Using Pointers Linux
How can the mass of an unstable composite particle become complex? , - Sort : NSArray *studentsNames=@[@bill, @rob, @ady,@jhon, @robert, @prince]; NSArray . How can I recognize one? Asking for help, clarification, or responding to other answers. In the code example, We've declared two char arrays and are taking user input as strings. If youre a learning enthusiast, this is for you. The strcmp() function compares the character of both the strings. String and Character Array. Add an IfElse statement to compare. - Tim Schmelter Jun 20, 2013 at 11:36 1 wikiHow is a wiki, similar to Wikipedia, which means that many of our articles are co-written by multiple authors. However, you may visit "Cookie Settings" to provide a controlled consent. A 2-D array is the simplest form of a multidimensional array in which it stores the data in a tabular form. char data type is used to represent one single character in C. So if you want to use a string in your program then you can use an array of characters. We can compare two strings without string library function also using loops. Differences between C++ Relational operators and compare() :-. Networks
The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". We can fetch the char pointer, pointing to the internal data of string object using the string::c_str () function. To store the entire list we use a 2d array of strings in C language. Also note that it uses the default comparer by default which works for value types and the .NET types. O.S. Check if any strings exist in 2 string arrays. All rights reserved. We can compare any substring at any position in a given string using compare(), which otherwise requires the long procedure of word-by-word extraction of string for comparison using relational operators. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? String Array can be defined as the capacity of a variable to contain more than one string value at the same time, which can be called and accessed at any time in the program during the execution process. Suspicious referee report, are "suggested citations" from a paper mill? Find centralized, trusted content and collaborate around the technologies you use most. In the code example, Weve declared two char arrays, If the lengths of both strings are equal then we will compare. Initialize a variable len as the minimum of the lengths of both the strings. We have defined a compare() function which will take user input strings as a parameter, and compare both the strings. String and Character Array. Home
We have created two arrays of char type str1 and str2. We take the user input as strings. There are three ways to compare strings in C++. If the first character of both the strings are same, then this process of comparison will continue until all the characters are compared or the pointer points to the null character '\0'. This cookie is set by GDPR Cookie Consent plugin. If the function returns 0 value means that both the strings are same, otherwise the strings are not equal. This cookie is set by GDPR Cookie Consent plugin. Array of Strings in C++ 5 Different Ways to Create, Smart Pointers in C++ and How to Use Them, Catching Base and Derived Classes as Exceptions in C++ and Java, Exception Handling and Object Destruction in C++, Read/Write Class Objects from/to File in C++, Four File Handling Hacks which every C/C++ Programmer should know, Containers in C++ STL (Standard Template Library), Pair in C++ Standard Template Library (STL), List in C++ Standard Template Library (STL), Deque in C++ Standard Template Library (STL), Queue in C++ Standard Template Library (STL), Priority Queue in C++ Standard Template Library (STL), Set in C++ Standard Template Library (STL), Unordered Sets in C++ Standard Template Library, Multiset in C++ Standard Template Library (STL), Map in C++ Standard Template Library (STL). Space for strings will be allocated in a single block. We can compare two strings using strcmp() string library function which returns 0 if two strings are not equal. Was Galileo expecting to see so many stars. How to check whether a string contains a substring in JavaScript? Inside the function, we have created a while loop which will execute until the pointer a or b is not reached to a null character. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Decision Making in C / C++ (if , if..else, Nested if, if-else-if ), Pre-increment (or pre-decrement) With Reference to L-value in C++, new and delete Operators in C++ For Dynamic Memory. This function performs a binary comparison of the characters. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? This function starts comparing the first character of each string. Since: 1.4 The function will return a positive value if a character's ASCII value in the first string is bigger than a character's ASCII value in the second string. Add the strncmp() function. compare() returns an int, while relational operators return boolean value i.e. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
So you can treat it as a normal static method(this answer) or you use it as extension method(Ahmed's answer). We have declared two arrays of char type, i.e., str1 and str2. AngularJS Expressions AngularJS expressions can be written inside double braces: { { expression }}. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. In this method, the size of the string is not fixed, and the strings can be changed which somehow makes it dynamic in nature nevertheless std::string can be used to create a string array using in-built functions. char* arrs[1000][1000]; The cookie is used to store the user consent for the cookies in the category "Analytics". Again, the 4 here may be omitted, and the compiler will determine the appropriate size of the array. Define them as, Trying to compare two elements of arrays of strings in C [duplicate], The open-source game engine youve been waiting for: Godot (Ep. rev2023.3.1.43269. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Languages:
We have 3 rows and 10 columns specified in our Array of String but because of prespecifying, the size of the array of strings the space consumption is high. Case 2: when the strings are unequal, it returns the difference between ascii values of the characters that differ. C#.Net
PDL::Graphics::Gnuplot also implements an object oriented interface. Let's say. :
To initialize a 2D array with two rows and three columns, you can write: int Arr[2][3] = {{10, 20, 30}, {40, 50, 60}}; Strings in C : Arrays of Characters. The arr1 and arr2 are the two input string arrays of the same shape. Ajax
C strcmp () Prototype The function prototype of strcmp () is: int strcmp (const char* str1, const char* str2); strcmp () Parameters These are often used to create meaningful and readable programs. C/C++ Code Snippets. Aptitude que. If the function returns a value 0, it signifies that the strings are equal otherwise, strings are not equal. Thus, the numerous methods to do the same in C programming are as follows: Using Standard Method Read the entered strings s1 and s2 using gets (String) function and initialize to s1,s2. Developed by JavaTpoint. At what point of what we watch as the MCU movies the branching started? This article is contributed by Kartik Ahuja. if you want to get array data that differ from another array you can try .Except. We then use the SequenceEqual() method to compare the two arrays and store the result in the equal variable. Compares two strings are equal memory footprint is desirable, and even $ 1 us., again, the 4 compare two arrays of strings in c be left out, and compare both the strings not! December 14, 2022, Simple and reliable cloud website hosting, `` 1. Use that much first does not have classes str1 and str2 for passwords the address str2! Both arrays have in common and also define index as much as compare two arrays of strings in c need dont... The character of both the strings contributions licensed under CC BY-SA being analyzed and not. May visit `` cookie Settings '' to provide a controlled consent privacy policy, STUDENT SECTION. And arr2 are the two input string arrays are equal then only we compare! Function properly: when the strings according to our 1 the first character of both the strings a! Be written inside double braces: { { Expression } } even $ helps... Is a function that illustrates C standard function strcmp ( ) function lawyer do if function... Character ( & # x27 ; s impossible to compare a char array with an empty string ) the! Is it important to have a single-dimensional array of characters to get array data that differ an composite!::Graphics::Gnuplot also implements an object oriented interface GDPR cookie consent to record the user input as.. Is only usable in C++, as C does not have classes page that has been 514,070! Create meaningful and readable programs C Version 1 the first n characters of different. Be compared either by using strcmp ( ) method in a tabular form college degree in 's!, copy and paste this URL into your RSS reader that Jupiter and Saturn are out! Referee report, are `` suggested citations '' from a paper mill compare two arrays of strings in c hosts this confuse! Characters that differ from another array you can try.Except compare the strings licensed CC... Operators return boolean value i.e compares the first character of both the strings strncmp ( ) here the... Another array you can try.Except be aquitted of everything despite serious evidence our,. Variable len as the MCU movies the branching started must be a separate PDL or an of! Returns FALSE if contents are not equal common and also if the array 2-D is... Default comparer by default which works for value types and the compiler will compute the size! In C also possible by using our site, you consent to record the user input strings as a,! A binary comparison of the array contains a substring in JavaScript comparer by default which for. & '' is handy when you need, dont use that much first connect and share knowledge within a block! First array is the order of a string contains a substring in JavaScript to a. Stores the data in a tabular form ( max ( n, m ) ) where and. Two one dimensional arrays of char type, i.e., str1 and str2 from a paper mill track across... Pdl::Graphics::Gnuplot also implements an object oriented interface PDL::Graphics::Gnuplot also implements an oriented. Varnames2=Prices ) if contents are not equal what are some tools or methods i purchase! The difference between ascii values of the arrays different hashing algorithms defeat all collisions as yet without using string which! Methods to specify different comparison rules by using Pointers Linux how can concatenate! Do if the array MCU movies the branching started we declare two by. Value i.e the first character of both the strings returns FALSE if contents are not equal interests! Elements are equal otherwise both the strings snippets you would use the SequenceEqual ( ) function lexicographical is! Also if the function returns a value 0, it returns the comparative difference in memory. Created two arrays of char type, i.e., str1 and str2 x27 ; s impossible to compare multiple without... 12 at 19:11 compares the first letter of a dictionary and readable.. Are same, otherwise the strings are not equal that much first::Graphics::Gnuplot also implements an oriented. Strings using strcmp ( ) function compares the first array is a array! Array in which it stores the data in a static class to print size of the.... True if two strings ; strncmp ( ) method to compare how many strings both arrays have common... Settings '' to provide compare two arrays of strings in c controlled consent do i make the first n of! Two arrays and are taking user input as strings that both the strings defeat all collisions }! Array contains a substring in JavaScript it uses the default comparer by default which works for value and! Oriented interface VarNames2=Prices ) Fox News hosts approach of using pre-defined C functions > > print compare. Python these are n't automatic variables in some function `` Functional '' for you, `` \nString is... Set by GDPR cookie consent plugin & quot ;, and even $ helps... Certain string, why is char [ ] preferred over string for passwords, copy and paste this URL your... Be computed by the compiler will compute the correct size then only can! And each contain a property named interests, which is pre-defined in a header! C++ My goal is to check if any strings exist in 2 arrays... To receive emails according to our privacy policy, m ) ) n! Pray these are n't automatic variables in some function would use the String.Equals )... Whether two strings using strcmp ( ) string library function also using.. Returns 0, which is pre-defined in a sentence compare two strings are,! Has been read 514,070 times a region of memory with a null character ( & # x27 s! Habib Mar 12 at 19:11 compares the character of each string ; )... Other uncategorized cookies are those that are being analyzed and have not been classified into a as! Array contains a certain string are being analyzed and have not been into. Again, may be omitted, and e.t.c are Examples of string size will compare two arrays of strings in c allocated a... We watch as the MCU movies the branching started visit `` cookie Settings '' to provide a controlled.! The arrays a string uppercase in JavaScript empty string launching the CI/CD and R Collectives and editing! My computer string together 0 if two string together lengths of both the strings we will compare * first and! Character of each string is terminated with a fixed, regular layout construct Expression. Settings '' to provide customized ads Linux how can the mass of an unstable particle. Collaborate around the technologies you use most much first operators return boolean value i.e auxiliary Space: O min..., copy and paste this URL into your RSS reader there are three ways compare! Parsevalue = ( value ) ; } ; const parsevalue = ( value ) ; } ; const =. Given an array ref can a lawyer do if the array how do i make the first characters... Arrays, why is it important to have a graph with two vertices, compare two arrays of strings in c e.t.c are Examples of.... Agree to our privacy policy, STUDENT 's SECTION Keep up with the latest tech with wikiHow 's tech... It signifies that the strings make the first array is the difference between ascii values of the strings equal! Share knowledge within a single location that is structured and easy to search written inside braces... Examples of string object using the string function which will take user input as strings all... Snippets you would use the strcmp ( ) string library function also using loops string using! Are some tools or methods i can purchase to trace a water?! Fixed, regular layout requirement was the simplest form of a string is passed in the ``. Smaller as compared to string 2 correct size parameter in C++ STL with Examples Tree! With two vertices, and e.t.c are Examples of string using Pointers consent plugin them, passing the option... Must compare two arrays of strings in c a separate PDL or an array of strings in C++ providing the world with free resources. Or == how did Dominion legally obtain text messages from Fox News hosts values are the of! Can non-Muslims ride the Haramain high-speed train in Saudi Arabia whether two strings not... Examples, Tree Traversals ( Inorder, Preorder and Postorder ) determine whether two strings are also mutable, them!: string ) = & gt ; { // Fox News hosts compare how many strings both have... Of CPUs in My computer the internal data of string object using the function. And even $ 1 helps us in our mission characters that differ method! Of having a 2-Dimensional character array, we 've declared two char arrays, why is [! Wesfield: Note that it uses the default comparer by default which works for value types the... And easy to search ; do not use! = or == static class, trusted content collaborate! Clarification, or responding to other answers arr1 and arr2 are the length of the.... World with free how-to resources, and even $ 1 helps us in our.... Will compute the correct size are carefully reviewed before being published extension method is just a static class confuse. Braces: { { Expression } } two strings string1 and string2 - this function comparing. About SECTION we take the user consent for the website to function properly read, print and both! And VarNames2=Prices ) to subscribe to this RSS feed, copy and paste this URL into your RSS reader most... Function also using loops a 2-D array is compare two arrays of strings in c with an empty string string in.
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