Home CPP Examples C++ Program to calculate the area using classes

C++ Program to calculate the area using classes

by anupmaurya

C++ Program to calculate the area using classes in two ways, one with “using one class and one object” and another with “using one class ,two objects“.

Using one class and one object.

#include<iostream> 
 using namespace
 class Rectangle {
     int width, height;
    public
     void set_values (int,int);
     int area() {return width*height;}
 };
 void Rectangle::set_values ( int x, int y) {
   width = x;
   height = y;
 }
 int main () {
   Rectangle rect;
   rect.set_values (3,4);
   cout<<"area: "<< rect.area();
  return  0;
 }

Output

area: 12

Using one class ,two objects

#include<iostream>
 using namespace std;
 class Rectangle
 {
 int width, height;
 public:
 void set_values (int, int);
 int area ()
   {
     return width * height;
   }
 };
 void
 Rectangle::set_values (int x, int y)
 {
 width = x;
 height = y;
 } 
 int
 main ()
 {
 Rectangle rect, rectb;
 rect.set_values (3, 4);
 rectb.set_values (5, 6);
 cout << "rect area: " << rect.area () << endl;
 cout << "rectb area: " << rectb.area () << endl;
 return 0;
 }

Output

rect area: 12 
rectb area: 30 

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