Question

我需要修改此代码以便从max到min进行计数，以便将方法stej的结果作为String类型输出到main方法。然后应在主方法中打印stej方法的返回。任何帮助将不胜感激。

public static void main(String[] args) {
    int max = 0, min = 0;
    Scanner vhod = new Scanner(System.in);

    System.out.print("This program counts down from the inputed max and min.\n");
    System.out.print("Max must be greater or same as min!\n");
    System.out.print("Enter max: ");
    max = vhod.nextInt();
    System.out.print("Enter min: ");
    min = vhod.nextInt();

    if(max>=min) {
        stej(max, min);
    }
    else
        System.out.print("\nERROR: not valid max and/or min!");
}

static void stej(int max, int min) {    
    if(max==min) {
        System.out.print(min);
    }
    else {
        System.out.print(max + " ");
        stej(max-1, min);
    }
}

Answer 1

我简化了main以避免输入，但代码如下所示：

public class Printing {
    public static void main(String[] args) {
        int max = 10, min = 5;

        if (max >= min) {
            String result = stej(max, min);
            System.out.println("Result is :" + result);
        } else
            System.out.print("\nERROR: not valid max and/or min!");
    }

    static String stej(int max, int min) {
        if (max == min) {
            return String.valueOf(min);
        } else {
            return max + " " + stej(max - 1, min);
        }
    }
}

Java - 递归倒计时

1 个答案: