Question

Do the problems found week 4 - Programs 1,2,3,4,5,6 and 7.

       * Be sure to add your name as a cout in the first lines of each program - else 0 credit.

       * Add constructors - a default and parameterized constructor to each.

       * Write an .h interface and a .cpp implementation for each class

       * Write an Drive/Test file that tests the constructors and functions

       * Write a UML class diagram for each class

Program 4:

#define SIZE 7

#include<string>

#include <iostream>

using namespace std;

class PickColor

{

private:

    string myColors[SIZE];

    

public:

    void setElement( int index, string color)

    {

        myColors[index]=color;

    }

    

    void printColors()

    {

        cout<<"All the colors in the array are : "<<endl;

        for(int i=0;i<SIZE;i++)

            cout<< myColors[i]<<" ";

        cout<<endl;

    }

    

    void printRandomColors()

    {

        cout<<"Randomly pick One color from the array is ";

        cout<< myColors[(rand()%7)]<<endl;

    }

    

    

};

int main()

{

    

    cout<<"NAME-DATE";

    PickColor p1;

    p1.setElement(0,"red");

    p1.setElement(1,"orange");

    p1.setElement(2,"yellow");

    p1.setElement(3,"green");

    p1.setElement(4,"blue");

    p1.setElement(5,"indigo");

    p1.setElement(6,"violet");

    

    p1.printColors();

    

    

    p1.printRandomColors();

    p1.printRandomColors();

    return 0;

}

Program 5:

#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 () {

    cout<<"NAME-DATE";

    Rectangle rect, rectb;

    rect.set_values (2,8);

    rectb.set_values (2,3);

    cout << "rect area: " << rect.area() << endl;

    cout << "rectb area: " << rectb.area() << endl;

    return 0;

    }

Answer 1

Program 4:

// PickColor.h

#ifndef PICKCOLOR_H_

#define PICKCOLOR_H_

#include <iostream>

using namespace std;

#define SIZE 7

class PickColor

{

private:

    string myColors[SIZE];

public:

    PickColor();

    PickColor(string color[SIZE]);

    void setElement( int index, string color);

    void printColors();

    void printRandomColors();

};

#endif /* PICKCOLOR_H_ */

//end of PickColor.h

// PickColor.cpp

#include "PickColor.h"

#include <cstdlib>

PickColor::PickColor()

{}

PickColor::PickColor(string color[SIZE])

{

       for(int i=0;i<SIZE;i++)

             myColors[i] = color[i];

}

void PickColor:: setElement( int index, string color)

{

       myColors[index]=color;

}

void PickColor:: printColors()

{

       cout<<"All the colors in the array are : "<<endl;

       for(int i=0;i<SIZE;i++)

             cout<< myColors[i]<<" ";

       cout<<endl;

}

void PickColor:: printRandomColors()

{

       cout<<"Randomly pick One color from the array is ";

       cout<< myColors[(rand()%7)]<<endl;

}

//end of PickColor.cpp

// main.cpp : Driver program to test PickColor class

#include "PickColor.h"

#include <iostream>

using namespace std;

int main()

{

       cout<<"NAME-DATE"<<endl;

PickColor p1; // test default constructor

      

p1.setElement(0,"red");

p1.setElement(1,"orange");

p1.setElement(2,"yellow");

p1.setElement(3,"green");

p1.setElement(4,"blue");

p1.setElement(5,"indigo");

p1.setElement(6,"violet");

p1.printColors();

p1.printRandomColors();

p1.printRandomColors();

string color[] = {"red","blue","green","yellow","black","white","brown"};

PickColor p2(color); // test parameterized constructor

p2.printColors();

p2.setElement(3,"purple");

p2.printColors();

p2.printRandomColors();

p2.printRandomColors();

           return 0;

}

//end of main.cpp

Output:

UML of PickColor:

Program 5:

// Rectangle.h

#ifndef RECTANGLE_H_

#define RECTANGLE_H_

class Rectangle

{

       int width, height;

public:

       Rectangle();

       Rectangle(int inWidth, int inHeight);

    void set_values (int,int);

    int area () ;

};

#endif /* RECTANGLE_H_ */

//end of Rectangle.h

// Rectangle.cpp

#include "Rectangle.h"

Rectangle::Rectangle()

{

       width = 0;

       height = 0;

}

Rectangle::Rectangle(int inWidth, int inHeight)

{

       width = inWidth;

       height = inHeight;

}

void Rectangle::set_values (int x, int y) {

    width = x;

    height = y;

}

int Rectangle::area()

{

       return width*height;

}

//end of Rectangle.cpp

//main.cpp : Driver program to test the Rectangle class

#include "Rectangle.h"

#include <iostream>

using namespace std;

int main()

{

       cout<<"NAME-DATE"<<endl;

       Rectangle rect, rectb(2,3); // test default and parameterized constructor

       rect.set_values (2,8);

       cout << "rect area: " << rect.area() << endl;

       cout << "rectb area: " << rectb.area() << endl;

       return 0;

}

//end of main.cpp

Output:

UML of Rectangle class: