strcmp()

The strcmp() function compares two strings and returns an integer value.

#include <string.h>

strcmp(string1, string2);

At the top of the file, the <string.h> header file needs to be included. The strcmp() function compares strings string1 and string2 and returns an integer value.

• If the two strings are the same, return 0.
• If string1 > string2, return positive value.
• If string1 < string2 or string1 is a substring of string2, return negative value.

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

int main() {
  char address1[20] = "575 Broadway";
  char address2[20] = "576 Broadway";

  if (strcmp(address1, address2) == 0) {
    printf("Address 1 and address 2 are equal.");
  }
  else {
    printf("Address 1 and address 2 are different.");
  }
  return 0;
}