C strcmp

 The strcmp() compares two strings character by character. If the strings are equal, the function returns 0. 

The syntax of strcmp() is:

 strcmp (str1,str2);

 Return Value from strcmp()

 

Return Value	Remarks
0	if strings are equal
non-zero	if strings are not equal

Example 

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

int main() {
  char str1[] = "mybcaclassnotes";

  char str2[] = "myBCAclassnotes", str3[] = "mybcaclassnotes";
  int result;

  // comparing strings str1 and str2
  result = strcmp(str1, str2);
  printf("strcmp(str1, str2) = %d\n", result);

  // comparing strings str1 and str3
  result = strcmp(str1, str3);
  printf("strcmp(str1, str3) = %d\n", result);

  return 0;
} 

Output

To Compare Two Strings without using strcmp()

#include<stdio.h>
 
int main() {
   char str1[30], str2[30];
   int i;
 
   printf("\nEnter First strings :");
   gets(str1);
    printf("\nEnter Secfond strings :");
   gets(str2);
 
   i = 0;
   while (str1[i] == str2[i] && str1[i] != '\0')
      i++;
   if (str1[i] > str2[i])
      printf("str1 > str2");
   else if (str1[i] < str2[i])
      printf("str1 < str2");
   else
      printf("str1 = str2");
 
   return (0);
} 

Output