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1.
* 根据键盘输入的圆柱体的半径和高求圆柱体的体积,运行效果如下:
面积=π*半径*半径
体积=面积*高
package com.qy151.fx; import java.util.Scanner; /** * @unthor : YSH * @date :
10:28 2022/5/7 */ public class Fx1 { public static void main(String[] args) {
double yzl=3.14; Scanner sr = new Scanner(System.in);
System.out.println("请输入圆柱体的半径:"); double r = sr.nextDouble();
System.out.println("请输入圆柱体的高:"); double h = sr.nextDouble(); //定义面积 double
mj=yzl*r*r; //定义体积 double tj=mj*h; //输出体积 System.out.println("此圆柱体的体积为:"+tj); }
}
2.
2、有A、B两个盒子 ，A盒子放的数字是6，B盒子里放的数字是8，现需要交换两个盒子里的数字
，让A盒子放的是8，B盒子放的是6。请用程序实现这个交换功能,运行效果如下:
package com.qy151.fx; /** * @unthor : YSH * @date : 10:34 2022/5/7 */ public
class Fx2 { public static void main(String[] args) { int A=6; int B=8;
//定义一个C，为中间变量 int C; System.out.println("交换前A盒子的数为:"+A+"\t"+"B的盒子数为:"+B); C=A;
A=B; B=C; System.out.println("交换后A盒子的数为:"+A+"\t"+"B的盒子数为:"+B); } }
