// Ex5_02.cpp
// A futile attempt to modify caller arguments
#include <iostream>
using std::cout;
using std::endl;

int incr10(int num);                   // Function prototype

int main()
{
  int num { 3 };

  cout << endl << "incr10(num) = " << incr10(num) << endl
        << "num = " << num << endl;
  return 0;
}

// Function to increment a variable by 10
int incr10(int num)                    // Using the same name might help...
{
  num += 10;                           // Increment the caller argument – hopefully
  return num;                          // Return the incremented value
}