Just open your c++ compiler Paste this code.
#include<iostream>
using namespace std;
class average
{
 private :
  int a,b;
float d;
public:
average()
{
}
void input()
{
cout<<"Enter 2 Numbers";
cin>>a>>b;
}
void sum()
{
cout<<"Sum =\t"<<a+b;

}
float avg()
{
d=(a+b)/2.0;
cout<<"\nAvg is=\t"<<d;
}

};
 int main()
 {
  int c;
  average m;
  m.input();
  m.sum();
m.avg();
 }