/*
 * To find the first occurrence of a substring t in s using pointers
 * @author-Karan Narain(karan@iitk.ac.in)
 *
*/
#include <stdio.h>
int find(char *s,char *t)
{
	int i=0,index=-1;
	char *x,*y;
	while(*s!='\0')
	{
		if(*s==*t)
		{
			index=i;
			x=s;
			y=t;
			while(*x==*y && *x!='\0')
			{
				x++;
				y++;
			}
			if(*y=='\0')
			return index;
		}
		s++;
		i++;
	}
	return -1;
}
int main()
{
	int index;
	char A[80],B[80],*s=NULL,*t=NULL;
	printf("Enter the string s\n");
	scanf("%s",&A);
	printf("Enter the string t\n");
	scanf("%s",&B);
	s=A;
	t=B;
	index=find(s,t);
	if(index==-1)
	printf("Not present\n");
	else
	printf("Present\n");
	printf("Index=%d\n",index);
	return 0;

}