C program to compare two strings without using library function

// c program to compare two strings without using library functions

#include <stdio.h>

int main()

{

char a[50];

char b[50];

int i, j, nr1=0, nr2=0;

printf("enter the two strings you want to compare\n");

scanf("%s %s", a, b);

//counting the length of each string

while(a[i]!=\0)

{

nr1++;

i++;

}

while(b[j]!=\0)

{

nr2++;

j++;

}

if(nr1 != nr2)

{

printf("NO different lengths");

return 0;

}

for(i=0;i<nr1;i++)

{if(a[i]!=b[j])

{ printf("NO");

return0;

}

}

printf("the strings are identic");

}