A simple function call: declare a function, define it, and call it. - C++ Function

C++ examples for Function:Function Creation

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Description

A simple function call: declare a function, define it, and call it.

Demo Code

#include <iostream>
using namespace std;
// Function must be declared before being used.
double avg(double x, double y);
int main()//from w ww  . j  a v  a  2  s .  c o  m
{
   double a = 0.0;
   double b = 0.0;
   cout << "Enter first number and press ENTER: ";
   cin >> a;
   cout << "Enter second number and press ENTER: ";
   cin >> b;
   // Call the function avg().
   cout << "Average is: " << avg(a, b) << endl;
   return 0;
}
// Average-number function definition
//
double avg(double x, double y) {
   return (x + y)/2;
}

Result


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