#ifndef SHAPE_H_INCLUDED #define SHAPE_H_INCLUDED #include #include using namespace std; const float PI = 3.1415926; class Shape{ private: string shapeType; string shapeId; string measureUnit; public: Shape(){} Shape(string id){ shapeId = id; } Shape(string id, string type, string unit){ shapeId = id; shapeType = type; measureUnit = unit; } string getShapeType(){ return shapeType; } string getShapeId(){ return shapeId; } string getMeasureUnit(){ return measureUnit; } void setShapeType(string type){ shapeType = type; } void setShapeId(string id){ shapeId = id; } void setMeasureUnit(string unit){ measureUnit = unit; } virtual float getArea() = 0; }; #endif // SHAPE_H_INCLUDED #ifndef CIRCLE_H_INCLUDED #define CIRCLE_H_INCLUDED #include "shape.h" #include //creating class 'circle' and defining member functions //with a 'public' access specifier meaning that //members are accessible from outside class and anywhere //within the scope of class object using namespace std; class circle: public Shape{ private: float radius; public: void setRadius(float r); float getRadius(); circle():Shape(){}; circle(string id, float r):Shape(id){}; circle(string id, string type, string unit, float r):Shape(id, type, unit){}; float getArea(); void display(); }; #endif // CIRCLE_H_INCLUDED #ifndef SQUARE_H_INCLUDED #define SQUARE_H_INCLUDED #include "shape.h" #include using namespace std; //creating class 'square' and defining member functions //with a 'public' access specifier meaning that //members are accessible from outside class and anywhere //within the scope of class object class square: public Shape{ private: float length; public: float getLength(); void setLength(float l); square():Shape(){}; square(string id, float l):Shape(id){}; square(string id, string type, string unit, float l):Shape(id, type, unit){}; float getArea(); void display(); }; #endif // SQUARE_H_INCLUDED #include "square.h" #include "shape.h" #include using namespace std; float length; //declaring variable length of the float type float square::getLength() { //getLength() function of the square type returns variable length (of float type) return length; } void square::setLength(float l) { //setLength function of the square type takes one parameter, variable l of the float type length = l; //assigning value 'l' to length } square():Shape(){ //initializing length to '0' in the square() member function length = 0; } square(string id, float l):Shape(id){ //square() takes one parameter, variable 'l' of the float type and assigns that value to 'length' length = l; } square(string id, string type, string unit, float l):Shape(id, type, unit){ length = l; } float getArea() { //function getArea() of the square type returns expression length*length return length * length; } void display(){ cout<<"Shape Id: "< #include using namespace std; float radius; //declaring variables and types string getShapeId(); string getShapeType(); string getMeasureUnit(); float getArea(); void circle::setRadius(float r) //Set value for radius { radius = r; } float circle::getRadius() //Get value for radius { return radius; } circle():Shape(){ radius = 0; } circle(string id, float r):Shape(id) { radius = r; } circle(string id, string type, string unit, float r):Shape(id, type, unit){ radius = r; } float getArea(float r) { radius = r; return PI*radius*radius; } void display(){ cout<<"Shape Id: "< #include "circle.h" #include "square.h" #include "shape.h" #include using namespace std; int main() { float radius; //declare variable and type float l; square sq; //instantiating an object of type square circle ci; //instantiating an object of type circle int menuSelect; //declaring menuSelect to accept int type do { cout << endl << "Calculate Area:" << endl; //do while loop to make sure the program runs once cout << endl << "Select a Shape: " << endl << "1: Circle " << endl //and ends the program when the condition is false at the << "2: Square " << endl << "0: Exit " << endl //end of the program which is 'false' by entering '0' << "Please make your selection: "; cin >> menuSelect; //Entering selection from list switch (menuSelect) { //testing the menuSelect expression against a list of menuSelect values case 1: cout << "Enter radius of the circle: "; cin >> radius; cout << "Area of circle: " << ci.getArea(radius) << endl; break; case 2: cout << "Enter length of one side of the square: "; cin >> l; sq.setLength(l); cout << "Area of Square: " << sq.getArea() << endl; break; } } while (menuSelect != 0); //exit-condition of do-while loop cout << endl << endl << "End Program" << endl << endl; //displays when condition is false otherwise program executes again return 0; }

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