string-comparision.c

#include <stdio.h>
// function to compare two strings
//  returns zero if they are exactly same otherwise the difference between given
//  two strings. The returned value is 0 is they are same, < 0 if s1<s2 or >0 if
//  s1>s2. The difference is calculated from the character position from which
//  they differ.
int string_compare(char *s1, char *s2) {
  for (; *s1 == *s2; s1++, s2++) {
    if (*s1 == '\0')
      return 0;
  }
  return s1 - s2;
}
int main() {
  char n1[] = "Ram bahadur";
  char n2[] = "Ram bhakta";
  printf("%d\n", string_compare(n1, n2));
}