CPE 112 – Computer Methods in Engineeing

Electrical and Computer Engineering

11 of 22

UAH

CPE 112

Function Declarations
and Definitions

•In C++, you must declare every identifier before it can be used. A function’s declaration must physically precede any function call.

•Example from welcome program

#include <iostream>

using namespace std;

void Print2Lines();

void Print4Lines();

•A function declaration announces to the compiler the name of the function, the data type of the function’s return value, and the data type of the parameters it uses.