/*Extraction of n characters from string starting at a given point*/
#include<stdio.h>
#include<string.h>

int main()
{
	int m,n;
	char a[100],b[100],*p,*q;
	
	puts("Enter string: ");
	fgets(a,100,stdin);
	
	puts("Enter starting point: ");
	scanf("%d",&m);
	
	puts("Enter number of characters: ");
	scanf("%d",&n);
	
	for(p=(a+(m-1)),q=b;p!=((a+(m-1))+(n));p++,q++)
		*q=*p;
	*q='\0';
	
	puts("Required substring: ");
	puts(b);
}