Skip to content

4.6 The ToString method

  1. Add a ToString() method to the Shape class: 

    1
2
3
4
5
    public override string ToString()
{
    return "Color: " + _color + "\nPerimeter: " + CalculatePerimeter() +
    "\nArea: " + CalculateArea();
}

  2. Add a ToString() method to the Point class: 

    1
2
3
4
    public override string ToString()
{
    return $"({X:F2}, {Y:F2})";
}

  3. Add a ToString() method to the Circle class: 

    1
2
3
4
5
    public override string ToString()
{
    return base.ToString() + "\nRadius: " + _radius + "\nCenter: " +
    _center.ToString();
}

    base.ToString() calls the ToString() method in the base class Shape. This returns a string as determined in step 1. The Circle class's own attributes are then added. Finally, the ToString() method of the Center point is called.

  4. Add a ToString() method to the Rectangle class:

    1
2
3
4
5
    public override string ToString()
{
    return base.ToString() + "\nLength: " + _length + "\nWidth: " +
    _width + "\nCorner: " + _topLeftCorner.ToString();
}

  5. Replace the two for-loops in your Main method as follows:

     1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
    for (int i = 0; i < myCircleArray.Length; i++)
{
    Console.WriteLine(myCircleArray[i]);
    Console.WriteLine(myCircleArray[i].DescribeSize());
}

for (int i = 0; i < myRectangleArray.Length; i++)
{
    Console.WriteLine(myRectangleArray[i]);
    Console.WriteLine(myRectangleArray[i].DescribeSize());
}

  6. Run your program.