C++ materials

http://augustcouncil.com/~tgibson/tutorial/iotips.html

simple main  function

int main()
{
int n;
cin>>n;
cout<<n;
std::cin.get(); //expect a char input
}

A+B problem


#include<iostream>
#include<fstream>

int a,b,sum;
int l=2000000000;
using namespace std;

int main() {
ifstream f;
f.open("adunare.in");
if (f.is_open()) {
f>>a;
f>>b;
}
if (a%1==0 && b%1==0){
if (a < l - b){
sum=a+b;
}
}
f.close();
ofstream o;
o.open("adunare.out");
o << sum;
o.close();
}