Fcuk yuo, im a plant

Sup, /prog/, this is my code.

If you can make it smaller and more efficient, whilst doing the same tasks, I will award you with some Internet points.


#include <iostream>
#include <string>
#include <math.h>

class Shape {
protected:
    double height, width;
public:
    virtual void set_values() = 0;
    virtual double area() = 0;
    virtual double perimeter() = 0;
    void printarea()
    { std::cout << "\nThe area is " << this->area() << " squared.\n"; }
    virtual void printperim() = 0;
};

class Triangle: public Shape {
public:
    double area()
    {
    return height * width / 2; }
    double perimeter() {
        double z = ((width * width) - ((height / 2) * (height / 2)));
        z = sqrt(z);
        return z + z + height;
    }
    void printperim() {
        std::cout << "\nThe perimeter is " << this->perimeter() << ".\n";
    }
   
    void set_values() {
        std::cout << "Please enter the height: ";
         std::cin >> height;
         std::cout << "And the width: ";
    std::cin >> width;
    }
};

class Rectangle: public Shape {
public:
    double area()
    {
    return height * width; }
    double perimeter() {
        return (height * 2) + (width * 2);
    }
    void printperim() {
        std::cout << "The perimeter is " << this->perimeter() << ".\n";
    }
    void set_values() {
        std::cout << "Please enter the height: ";
         std::cin >> height;
         std::cout << "And the width: ";
    std::cin >> width;
    }
};

class Circle: public Shape {
public:
    double area()
    {
    return height * height * 3.14159265; }
    double perimeter() {
        return (height * 2) * 3.14159265; }
    void printperim() {
        std::cout << "The circumfrence is " << this->perimeter() << ".\n";
    }
    void set_values() {
        std::cout << "Please enter the radius: ";
        std::cin >> height; }
};

int main() {
    std::string Input;
    while(true) {
        std::cout << "Please choose a shape (Type it in, then press enter)\n  Rectangle\n  Triangle\n  Circle\n  Exit (To close program)\n";
        std::getline(std::cin, Input);
        if(Input == "Rectangle" || Input == "rectangle" || Input == "RECTANGLE") {
            Shape* rect = new Rectangle;
            std::cout << "\nDo you want to find the\n Area\n Perimeter\n";
            std::getline(std::cin, Input);
            if(Input == "Area" || Input == "AREA" || Input == "area") {
            rect->set_values();
            rect->printarea();
            delete rect;
            std::cin.ignore();
            }
            else if(Input== "Perimeter" || Input == "PERIMETER" || Input == "perimeter") {
                rect->set_values();
                rect->printperim();
                delete rect;
                std::cin.ignore();
            }
            else { std::cout << "\n\nWrong Input Received."; delete rect; }
        }
        else if(Input == "Triangle" || Input == "triangle" || Input == "TRIANGLE") {
            Shape* tri = new Triangle;
            std::cout << "\nDo you want to find\n Area\n Perimeter\n";
            std::getline(std::cin, Input);
            if(Input == "Area" || Input == "area" || Input == "AREA") {
            tri->set_values();
            tri->printarea();
            delete tri;
            std::cin.ignore();
            }
            else if(Input == "Perimeter" || Input == "Perimeter" || Input == "PERIMETER") {
                tri->set_values();
                tri->printperim();
                delete tri;
                std::cin.ignore();
            }
            else { std::cout << "\n\nWrong Input Received."; delete tri; }
        }
        else if(Input == "Circle" || Input == "circle" || Input == "CIRCLE") {
            Shape* circ = new Circle;
            std::cout << "\nDo you want to find the\n Area\n Circumfrence\n";
            std::getline(std::cin, Input);
            if(Input == "Area" || Input == "area" || Input == "AREA") {
            circ->set_values();
            circ->printarea();
            delete circ;
            std::cin.ignore();
            }
            else if(Input == "Circumfrence" || Input == "circumfrence" || Input == "CIRCUMFRENCE") {
                circ->set_values();
                circ->printperim();
                delete circ;
                std::cin.ignore();
            }
            else { std::cout << "\n\nWrong Input Received."; delete circ; }
        }
        else if(Input == "Exit" || Input == "exit" || Input == "EXIT") {
            exit(0);
        }
        else std::cout << "\nWrong input received. \nPlease make sure you spelt the word correctly and used capitals.";
    std::cout << "\n\n\n         Press <Enter> to continue.";
    std::cin.get();
    system("CLS");
    }
    return 0;
}

>>13

And replace with what?