(C++) I wrote this program, and it should calculate the area and perimeter of a

Question

(C++)

I wrote this program, and it should calculate the area and perimeter of a plot. However, when I run the program, the values that show up for area/boundary are giant numbers that don't make sense. Can someone point out where I'm writing the code incorrectly? Thanks!

#include <iostream>
using namespace std;

class Plot
{
public:
void setLength();
void setWidth();
void area()
{
  cout << "Area of the plot is: " << (length*width) << endl;
};
void boundary()
{
  cout << "Boundary of the plot is: " << (2 * (length + width)) << endl;
};

private:
int length;
int width;

};

void Plot::setLength()
{
length = 0;
}

void Plot::setWidth()
{
width = 0;
}

int main()
{
Plot myPlot;
int length = 7;
int width = 9;

cout << "Length of the plot is: " << length << endl;
cout << "Width of the plot is: " << width << endl;

cout << endl;
myPlot.area();
myPlot.boundary();
}

Explanation / Answer

class Plot
{
public:
//get and set functions declarations
void setLength(int l);
void setWidth(int w);
int getLength();
int getWidth();

void area()
{
cout << "Area of the plot is: " << (length*width) << endl;
}
void boundary()
{
cout << "Boundary of the plot is: " << (2 * (length + width)) << endl;
}
private:
int length;
int width;
};

//definitions of set and get functions
void Plot::setLength(int l)
{
length = l;
}
void Plot::setWidth(int w)
{
width = w;
}
int Plot::getLength()
{
return length;
}
int Plot::getWidth()
{
return width;
}
int main()
{
Plot myPlot;
//set the length and width of myPlot
myPlot.setLength(7);
myPlot.setWidth(9);

//get the length and width of myPlot
cout << "Length of the plot is: " << myPlot.getLength() << endl;
cout << "Width of the plot is: " << myPlot.getWidth() << endl;
cout << endl;

myPlot.area();
myPlot.boundary();
}

Output:

Length of the plot is: 7
Width of the plot is: 9

Area of the plot is: 63
Boundary of the plot is: 32

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