Answer Posted / vignesh1988i

#include<stdio.h>
#include<conio.h>
int xstrcmp(char*,char*);
void main()
{
int c;
char a1[20],a2[20];
printf("enter the two strings :");
gets(a1);
gets(a2);
c=xstrcmp(&a1[0],&a2[0]);
printf("%d",c);
getch();
}
int xstrcmp(char *a,char *a1)
{
if((*a)!=(*a1))
return((*a)-(*a1));
else if((*a)!='\0' && (*a1)!='\0')
{
(*a)++;
(*a1)++;
xstrcmp(a,a1);
}
else
return 0;
}

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