#include<stdio.h>
#include<conio.h>
void main()
{
    char a[21],b[21];
    int a1,n1,n2,j;
    int i;
    clrscr();
    printf("\n Please Give The STRING OF A : ");
    scanf("%s",a);
    flushall();
    printf("\n Please Give The STRING TO B : ");
    scanf("%s",b);

    for(i=0,n1=0;a[i]!='\0';i++)
        n1++;
    for(i=0,n2=0;b[i]!='\0';i++)
        n2++;


    if(n1 < n2)
    {
    for(i=0;i<n2;i++)
    {
        if(a[i]==b[i])
            j=0;
        else
        {
            a1=a[i]-b[i];
            printf(" THE DIFFERENCE BETWEEN IS HERE %d",a1);
            j++;
            break;
        }
    }
    }
    else
    {
     for(i=0;i<n1;i++)
     {
        if(a[i]==b[i])
            j=0;
        else
        {
            a1=a[i]-b[i];
            printf(" THE DIFFERENCE BETWEEN IS HERE %d",a1);
            j++;
            break;
        }
     }
    }

    if(j==0)
        printf(" BOTH ARE EQUALS");


    getch();
}


--------------------------------- OUTPUT ---------------------------------



 Please Give The STRING OF A : MCA001

 Please Give The STRING TO B : MCa001

 THE DIFFERENCE BETWEEN IS HERE -32



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