Question

How to compare two strings ignoring case in C

Answer 1

#include <stdio.h>
#include <string.h>

// int strcasecmp(const char *s1, const char *s2);
// int strncasecmp(const char *s1, const char *s2, size_t n);

/*
return:
0 if both the strings are equal
< 1 if s1 is less than s2.
> 1 if s1 is greater than s2
*/

int main() {
    char s1[] = "C++ PROGRAMMING";
    char s2[] = "c++ programming";
      
    if (strcasecmp(s1, s2) == 0) {
        printf("s1 == s2");
    } else {
        printf("s1 != s2");
    }
    
    return 0;
}

 
   
/*
run:
   
s1 == s2
   
*/

 

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