java编写程序,从键盘输入圆柱体的底半径r和高h,然后计算其体积并输出.

import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("input a number as r : ");
		int r = sc.nextInt();
		System.out.println("input a number as h : ");
		int h = sc.nextInt();
		System.out.println("圆柱体的体积是：" + (3.14 * r * r * h));
	}
}

import java.util.Scanner;

public class Test{
public static void main(String args[]){
Scanner sc = Scanner(System.in);
double r = sc.nextInt();//读取的第一个值为半径
double h = sc.nextInt();//读取的第二个值为高
double s = 3.14159*r*r*h;
System.out.println(s);
}
}

import java.util.Scanner;

public class Volume {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
float r = sc.nextFloat();
float h = sc.nextFloat();
double vol = new Volume().volume(r, h);
System.out.println("The volume of yuanzhu is :" + vol);
}

public double volume(float r,float h){
double vol =3.1415*r*r*h;
return vol;
}

}

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