// This program demonstrates a function with three parameters.
#include <iostream>
using namespace std;

// Function Prototype
void showSum(int, int, int);

int main()
{
   int value1, value2, value3;
   
   // Get three integers.
   cout << "Enter three integers and I will display ";
   cout << "their sum: ";
   cin >> value1 >> value2 >> value3;
   
   // Call showSum passing three arguments.
   showSum(value1, value2, value3); 
   return 0;
}

//************************************************************
// Definition of function showSum.                           *
// It uses three integer parameters. Their sum is displayed. *
//************************************************************

void showSum(int num1, int num2, int num3)
{
   cout << (num1 + num2 + num3) << endl;
}