#include<conio.h>
#include<stdio.h>
#include<string.h>
int subst(char *a,char*b);

void main()
{
 char a[20],b[10];
 int x;
 clrscr();
 printf("ENTER ANY STRING:\n");
 scanf("%s",a);
 printf("ENTER THE SUB-STRING:\n");
 scanf("%s",b);
 x=subst(a,b);
 if(x==1) printf("\nSUBSTRING IS A PART OF THE STRING:");
 else printf("\nSUB-STRING ABSENT:");
 getch();
}

int subst(char *a,char*b)
{
 int i,j,k,l1,l2;
 l1=strlen(a);
 l2=strlen(b);
 for(i=0;i<=l1-l2;i++)
 {
  for(j=i,k=0;k<l2 && a[j]==b[k];j++,k++);
   if(k==l2) return 1;
  }
    return 0;

}