How to use strcmp

#include<stdio.h>
#include<string.h>
int main()
{
const char *x="memm";
const char *y="mmea";
int c;
c=strcmp(x,y);
if(c==0) {printf("0\n");}
if(c<0)  {printf("-1\n");}
if (c>0) {printf("1\n");}
}