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  1. #include <iostream>
  2. #include <cmath>
  3. #define PI 3.14159
  4.  
  5. class Shape{
  6. public:
  7.      virtual double getArea() = 0;
  8.      virtual double getPerimeter() = 0;
  9. };
  10. class Rectangle : public Shape{
  11. private:
  12.      double width, height;
  13.  
  14. public:
  15.      Rectangle(){
  16.           std::cout << "    Enter width: ";
  17.           std::cin >> width;
  18.           std::cout << "    Enter height: ";
  19.           std::cin >> height;
  20.      }
  21.      double getArea(){
  22.           return width * height;
  23.      }
  24.      double getPerimeter(){
  25.           return (width+height)*2;
  26.      }
  27. };
  28.  
  29. class Circle : public Shape{
  30. private:
  31.      double radius;
  32. public:
  33.      Circle(){
  34.           std::cout << "    Enter radius: ";
  35.           std::cin >> radius;
  36.      }
  37.      double getArea(){
  38.           return PI*pow(radius, 2);
  39.      }
  40.      double getPerimeter(){
  41.           return 2*PI*radius;
  42.      }
  43. };
  44.  
  45. class Triangle : public Shape{
  46. private:
  47.     double base, L_Side, R_Side, height;
  48. public:
  49.     Triangle(){
  50.          std::cout << "     Enter base length: ";
  51.          std::cin >> base;
  52.          std::cout << "     Enter left side length: ";
  53.          std::cin >> L_Side;
  54.          std::cout << "     Enter right side length: ";
  55.          std::cin >> R_Side;
  56.          std::cout << "     Enter height: ";
  57.          std::cin >> height;
  58.     }
  59.     double getArea(){
  60.          return 0.5 * base * height;
  61.     }
  62.     double getPerimeter(){
  63.         return base + L_Side + R_Side;
  64.     }
  65. };
  66.  
  67. int main(){
  68.     std::cout << "Rectangle: \n";
  69.     Rectangle R1;
  70.     std::cout << "  Area: " << R1.getArea() << "\n";
  71.     std::cout << "  Perimeter: " << R1.getPerimeter() << "\n\n";
  72.  
  73.     std::cout << "Circle: \n";
  74.     Circle C;
  75.     std::cout << "Circle: \n";
  76.     std::cout << "  Area: " << C.getArea() << "\n";
  77.     std::cout << "  Perimeter: " << C.getPerimeter() << "\n\n";
  78.  
  79.     std::cout << "Triangle: \n";
  80.     Triangle T;
  81.     std::cout << "  Area: " << T.getArea() << "\n";
  82.     std::cout << "  Perimeter: " << T.getPerimeter() << "\n\n";
  83.  
  84.     return 0;
  85. }
  86.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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Standard input is empty
stdout
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Rectangle: 
    Enter width:     Enter height:   Area: 0
  Perimeter: 1.39061e-309

Circle: 
    Enter radius: Circle: 
  Area: 0
  Perimeter: 2.91611e-309

Triangle: 
     Enter base length:      Enter left side length:      Enter right side length:      Enter height:   Area: 0
  Perimeter: 9.28228e-310
https://ideone.com/Z6MuI7
language:
C++ (gcc 8.3)
created:
17 days ago
visibility:
public

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