C++ program to calculate area of square, area of circle and area of rectangle

#include<iostream.h>
#include<conio.h>
class area
{       private:
  int a,r,l,b,a1;
 public:
  void getdata();
  void sqr();
  void crl();
  void rec();
};
void area::getdata()
{
 cout<<"\nenter a,b,l,r:";
 cin>>a>>b>>l>>r;
}
void area::sqr()
{
 //int a,a1;
 //cout<<"\nenter a:";
 //cin>>a;
 a1=a*a;
 cout<<"\narea of squre:"<<a1;
}
void area::crl()
{
 //int r,a1;
       // cout<<"\nenter r:";
 //cin>>r;
 a1=3.14*r*r;
 cout<<"\narea of circle is:"<<a1;
}
void area::rec()
{
 //int l,b,a1;
 //cout<<"\nenter l,b:";
 //cin>>l>>b;
 a1=l*b;
 cout<<"\narea of rectangle is:"<<a1;
}
void main()
{
 clrscr();
 area x;
 x.getdata();
 x.sqr();
 x.crl();
 x.rec();
 getch();
}

Categories: CPP