#include<stdio.h>
#include<conio.h>
int sum(int,int);

void main()
{
 int a,b;
 clrscr();
 printf("ENTER ANY TWO NUMBERS");
 scanf("%d %d",&a,&b);
 printf("sum is %d",sum(a,b));
 getch();
}


int sum(int a,int b)
{
if(b==0) return 1;
else return(a+sum(1,--b));
}