The function call stack and activation records : function definition « Function « C++ Tutorial

1. C++ Tutorial
2. Function
3. function definition

#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int f( int );

int main()
{
   int a = 10; 

   cout << a << " fd: " << f( a ) << endl;
   return 0;
} 

int f( int x )
{
   return x * x;
}

10 fd: 100