//
// Example 3.4. Demonstration of how a function cannot change
// the contents of a pass by value parameter
//

#include <iostream>

using namespace std;

int main()
{
   void modifyI(int i);     // prototype local to main
   int i;                   // local to main

   i = 1;                   // local variable is assigned 1
   cout << "Before calling modifyI, i equals " << i << endl;
   modifyI(i);
   cout << "After calling modifyI, i equals " << i << endl;

   return 0;
}


//
// Function with local variable i
// Pre:  none
// Post: Local variable i is assigned 3.
//

void modifyI()
{
   int i;       // local to modifyI

   i = 3;       // local i is assigned 3
}