public class Cycle {public static void main(String[] args) {double r = 1.5;double h = 3;double pai = 3.14;double C = 2 * pai * r;double S = pai * r * r;double B = S * 2 + C * h;double VQ = 0.75 * S * ...太棒啦……要是结果能自动换行就更好了！自己去弄选为答案吧