Question

System.out.println("Do you want to add 1? if yes type in '0.01' ");

问题是它只能运行一次。我试图将其添加到while循环（while（i> 100））中，但它只是打印到100，直到再次询问用户为止。

我的代码：

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        int i = 0;
        double yes = 0.01;

        System.out.println("i = " + i);
        System.out.println("Do you want to add 1? if yes type in '0.01' ");

        Scanner keyboardInput = new Scanner(System.in);
        double add = keyboardInput.nextDouble();

        if (yes == add) {
            i++;
            System.out.println("i now is: " + i);
       }
    }

}

Answer 1

写while(i < 100)而不是while(i > 100)

这很好：

public static void main(String[] args) {
    int i = 0;
    double yes = 0.01;

    while(i < 100) {
        System.out.println("i = " + i);
        System.out.println("Do you want to add 1? if yes type in '0.01' ");

        Scanner keyboardInput = new Scanner(System.in);
        double add = keyboardInput.nextDouble();

        if (yes == add) {
            i++;
            System.out.println("i now is: " + i);
        }
    }
}

仅当用户输入键时如何使计数器加1

1 个答案: