llamado de funciones

[zerohours]

cout
http://www.cplusplus.com/reference/iostream/cout/

cin
http://www.cplusplus.com/reference/iostream/cin/

Ejemplo:

Código C++:

// i/o example
 
#include <iostream>
using namespace std;
 
int main ()
{
  int i;
  cout << "Please enter an integer value: ";
  cin >> i;
  cout << "The value you entered is " << i;
  cout << " and its double is " << i*2 << ".\n";
  return 0;
}
 

Espero te sirva.