oops3_c

#include<iostream.h>

class area
{
public:
    double r,ht,l,b,a,ba;

    double circle()
    {
        return (3.14*r*r);
    }

    double triangle()
    {
        return ((ba*ht)/2);
    }

    double cube()
    {
        return (a*a*a);
    }

    double rect()
    {
        return (l*b);
    }
};

int main()
{
    area x;
    cout<<"enter the following data:\n";
    cout<<"radius:\n";
    cin>>x.r;
    cout<<"height and base value of triangle:\n";
    cin>>x.ht>>x.ba;
    cout<<"side if a cube\n";
    cin>>x.a;
    cout<<"lenght and breadth of a rectangle':\n";
    cin>>x.l>>x.b;
    cout<<"the are of the geometrical figures are:\n";
    cout<<"area of circle: "<<x.circle()<<endl;
    cout<<"area of triangle: "<<x.triangle()<<endl;
    cout<<"area of cube: "<<x.cube()<<endl;
    cout<<"area of rectangle: "<<x.rect()<<endl;
    return 0;
}

OUTPUT:
enter the following data:
radius:
5
height and base value of triangle:
4
12
side if a cube
2
lenght and breadth of a rectangle':
10
5
the are of the geometrical figures are:
area of circle: 78.5
area of triangle: 24
area of cube: 8
area of rectangle: 50
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