making your own strcmp function

 #include <stdio.h>

#include <string.h>

int main(){

char st1[30];

char st2[30];

char c;

int i=0;

printf("Enter string 1:\n");

scanf("%s",st1);

printf("Enter string 2 character by character:\n");

while(c!='\n')

{

fflush(stdin);

scanf("%c",&c);

st2[i]=c;

i++;

}

st2[i-1]='\0';

printf("String 1 is:%s\n",st1);

printf("string 2 is:%s\n",st2);

printf("The comparison of string 1 and string 2 returns:%d",strcmp(st1,st2));

 return 0;

}