Java 输入圆的半径r,计算并输出圆的面积和周长。 提示:半径r要定义成浮点类型,π需要定义成常量
时间: 2023-09-15 18:18:21 浏览: 105
Sure, the formula for calculating the area and circumference of a circle with radius 'r' is:
Area = π * r * r
Circumference = 2 * π * r
Since you've mentioned that π should be defined as a constant, we can define it as:
final double PI = 3.14159265359; // constant definition
double r = <<input radius here>>; // input radius from user
double area = PI * r * r; // calculating area
double circumference = 2 * PI * r; // calculating circumference
System.out.println("Area of the circle: " + area);
System.out.println("Circumference of the circle: " + circumference);
Hope this helps!
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