package Ball;
import java.util.Scanner;
public class ball {
public static void main(String[] args) {
// TODO 自动生成的方法存根
System.out.println("请输入球的半径");
Scanner scanner = new Scanner(System.in);
while(scanner.hasNext()) {
float R = scanner.nextFloat();
if(R<=0) {
System.out.println("请输入正确的数字");
}else if(R>0){
float V = ((int)4*(float)3.14*R*R*R)/(int)3;
System.out.printf("球的体积为：%.2f",V,"/n");
}else {
System.out.println("请输入正确的数字");
}
}
}
}

私