#include<iostream>
using namespace std;
#include<conio.h>
void sum(void);//function prototype
void dif(int, int);
void main()
{int c,d;
cout<<"enter 2 no of which u want a difrnc"<<endl;
cin>>c>>d;
dif(c,d);//function calling
cout<<"back in main\n";
_getch();
}
void sum()//function defination
{
int c,d;
int sum=0;
cout<<"enter 2 no"<<endl;
cin>>c>>d;
sum=c+d;
cout<<"sum is ="<<sum<<endl;
}
void dif(int c, int d)
{
int difr=0;
difr=c-d;
cout<<"difrence is "<<difr<<endl;
sum();
cout<<"back in diff fun\n";
}
