Help C programming How to convert into template classes Test

Help!!! C++ programming How to convert into template classes

Test each with Implicit int, float, double, long int.

Test each with explicit int, float, double, long int.

Header.h

#ifndef Header_h

#define Header_h

class Rectangle // Defination of Class Rectangle

{

public: //public variables and functions

void set_values(int x, int y); // public function with variables x and y, they are ints

int area(); //public function area

~Rectangle()

{

cout << \"This is a deconstructor.\" << endl; //This defines the deconstructor of the class.

}

private:

int width, height;

};

#endif /* Header_h */

Source.cpp

#include <iostream>

#include <string>

using namespace std;

#include \"Header.h\"

void Rectangle::set_values(int x, int y)// Implementation of function Rectangle with input variable x and y

{

width = x; // parameter transmission, transmite formal parameter to pratical parameter width

height = y; // parameter transmission, transmite formal parameter to pratical parameter height

}

int Rectangle::area() // Implementation of function Rectangle

{

int answer; // Set parameter

answer = width * height;// Calculate the area of the rectangle

return answer; // return the result of calculation

}

Main.cpp

#include <iostream>

#include <string>

using namespace std;

#include \"Header.h\"

int main() // Testing program

{

  

Rectangle rect1; // DECLARATION - USE the new datatype / class \'Rectangle\' in a Declaration statement to create \'rect1\'

rect1.set_values(5, 6); // Use set_values function to set values

cout << \"area: \" << rect1.area() << endl; // Output the result

  

Rectangle rect2; // DECLARATION

rect2.set_values(3, 4); // Use set_values function to set values

cout << \"area: \" << rect2.area() << endl; // Output the result

  

// system(\"pause\"); // Mac not support

return 0;

}

Solution

#ifndef Header_h
#define Header_h
#include<iostream>
using namespace std;
//template class of type ,T
template<class T>
class Rectangle // Defination of Class Rectangle
{
public: //public variables and functions
    void set_values(T x, T y); // public function with variables x and y, they are ints
    T area(); //public function area
   ~Rectangle(){}
private:
    T width;
   T height;
};

//template defintion of class method set_values
template <class T>
void Rectangle<T>::set_values(T x, T y)
{
    width = x; // parameter transmission, transmite formal parameter to pratical parameter width
    height = y; // parameter transmission, transmite formal parameter to pratical parameter height
}

//template defintion of class method area
// Implementation of function Rectangle
template <class T>
T Rectangle<T>::area()
{

    T answer; // Set parameter
    answer = width * height;// Calculate the area of the rectangle
    return answer; // return the result of calculation
}

#endif Header_h/* Header_h */

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//Main.cpp

#include <iostream>
#include <string>
//include Rectangle.h
#include \"Rectangle.h\"
using namespace std;
int main() // Testing program
{

   //Creat an objct of type Rectangle of input type integer
   Rectangle<int> rect1;
      
    rect1.set_values(5, 6); // Use set_values function to set values
    cout << \"area: \" << rect1.area() << endl; // Output the result

   //Creat an objct of type Rectangle of input type float
    Rectangle<float> rect2; // DECLARATION
    rect2.set_values(3.0, 4.0); // Use set_values function to set values
    cout << \"area: \" << rect2.area() << endl; // Output the result

    system(\"pause\"); // Mac not support

    return 0;

}

------------------------------------------------------------------------------------------------------------

Sample output:

area: 30
area: 12