Scope Example in C++


Description:

A scope is a region of the program and broadly speaking there are three places, where variables can be declared − Inside a function or a block which is called local variables, In the definition of function parameters which is called formal parameters. Outside of all functions which is called global variables.

Example Program:

Find out the area of rectangle in C++

Source Code

#include<iostream>
using namespace std;
class Rectangle
{
private :
    int length;
    int breadth;
    public :
    Rectangle(int l=0,int b=0) //Parameterized Constructor Default Arguments
    {
        length=l;
        breadth=b ;
    }
    int area()
    {
        return length*breadth;
    }
    int perimeter();

};
int Rectangle::perimeter()
{
    return 2*(length+breadth);
}
int main()
{
    Rectangle r;

    cout<<"Area : "<<r.area();
    return 0;
}

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Output

Area : 0

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