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2.5 Arrays of objects

  1. Change the code of the Main method as follows: 

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    Circle[] myCircleArray = new Circle[3];
myCircleArray[0] = new Circle(3, 1, 4, "green");
myCircleArray[1] = new Circle();
myCircleArray[2] = new Circle(6);

for (int i = 0; i < myCircleArray.Length; i++)
{
    Console.WriteLine(myCircleArray[i].CalculatePerimeter());
    Console.WriteLine(myCircleArray[i].CalculateArea());
}

    The syntax for declaring and instantiating an array is the same. The three objects of the Circle class are placed in an array. A for-loop is used to access the three circles.

  2. Run your program. Your output will look like this: 

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    18.84955592153876
28.274333882308138
6.283185307179586
3.141592653589793
37.69911184307752
113.09733552923255

    Note that the output is the same as in Exercises 1.3 and 2.4.

  3. Try some other values and view the output.