Apr28

C++ FUNCTIONS

by glenda on April 28th, 2011 at 4:08 am
Posted In: Tutorials, C++, Tutorials, C++, C++ FUNCTIONS, Tutorials


FUNCTIONS
=> is a group of statements that together perform a task.

Syntax:
type function_name (parameter list)

* DEFINING and CALLING A FUNCTION *

Implementing any function in addition to main involves two steps:
1. Defining the Function
2. Calling the Function

take this a look:

#include<iostream>
using namaspace std;

int main()
{
printMessage();
return 0;
}

void printMessage(void)
{
cout<<“HELLO WORLD!”;
}

sample program :
create a program with two subfunctions that performs addition and subtraction.

#include<iostream>
using namaspace std;

int main()
{
int num1,num2,sum,diff;
cout<<“Enter first number: \n”;
cin>>num1;
cout<<“Enter second number: \n”;
cin>>num2;

addnum(num1,num2,sum);
subnum(num1,num2,diff);
cout<<sum;
cout<<diff;

retur 0;
}

void addnum(int x,int y,int &z)
{
z=x+y;
}

void subnum(int a,int b,int &c)
{
c=a-b;
}

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