当用户输入是时程序继续

Question

好的，所以我的程序工作正常，但最后它询问用户是否想输入另一组整数，如果他们输入 "yes" 过程开始超过。我的程序正在重新开始，但它保留了所有相同的用户输入，因此它只是不断重复原始输入的相同输出。

这是我的代码

import java.util.Scanner;

public class PositiveNegative {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.print("Input a list of integers (end with 0): ");
        int nums = input.nextInt();

        String answer;
        int pos = 0;
        int neg = 0;
        int total = 0;
        int count = 0;
        double avg = 0;

        do {
            while (nums != 0) {
                if (nums >= 1) {
                    pos++;
                } else {
                   neg++;
                }
                total = total + nums;
                count++;

                avg = total * 1.0 / count;

                System.out.print("Input a list of integers (End with 0): ");
                nums = input.nextInt();
            }
            System.out.print("# of positives are: " + pos + "\n" + "# of negatives are : " + neg + "\n" + "The total: " + total + "\n" + "The average: " + avg);
            System.out.print("\nWould you like to continue with new inputs? ");
            answer = input.next();
        } while (answer.equalsIgnoreCase("Yes"));
    }  
}

我当前的输出如下所示：

Input a list of integers (end with 0): 1

Input a list of integers (End with 0): 2

Input a list of integers (End with 0): -1

Input a list of integers (End with 0): 3

Input a list of integers (End with 0): 0

number of positives are: 3

number of negatives are : 1

The total: 5

The average: 1.25

Would you like to continue with new inputs? yes

number of positives are: 3

number of negatives are : 1

The total: 5

The average: 1.25

Would you like to continue with new inputs?

它应该看起来像这样：

number of positive inputs: 3

number of negative inputs: 1

The total: 5.0

The average: 1.25

Would you like to continue with new inputs? yes

Input a list of integers (end with 0): 0

No numbers were entered except 0

Would you like to continue with new inputs? no

Answer 1

您的变量声明应该放在 do ... while 块中，以便在用户想要继续时可以对其进行初始化。

替换

 int pos = 0;
 int neg = 0;
 int total = 0;
 int count = 0;
 double avg = 0;

 do{
     //...

和

do {
    int pos = 0;
    int neg = 0;
    int total = 0;
    int count = 0;
    double avg = 0;
    //...

Answer 2

这样做

import java.util.Scanner;

public class PositiveNegative {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        String answer;
        do {
            System.out.print("Input a list of integers (end with 0): ");
            int nums = input.nextInt();

            int pos = 0;
            int neg = 0;
            int total = 0;
            int count = 0;
            double avg = 0;

            while (nums != 0) {
                if (nums >= 1) {
                    pos++;
                } else {
                   neg++;
                }
                total = total + nums;
                count++;

                avg = total * 1.0 / count;

                System.out.print("Input a list of integers (End with 0): ");
                nums = input.nextInt();
            }

            if(count == 0) {
                System.out.print("No numbers were entered except 0");
            } else {
                System.out.print("# of positives are: " + pos + "\n" + "# of negatives are : " + neg + "\n" + "The total: " + total + "\n" + "The average: " + avg);
            }
            System.out.print("\nWould you like to continue with new inputs? ");
            answer = input.next();
        } while (answer.equalsIgnoreCase("Yes"));
    }  
}

当用户输入是时程序继续

continuation of program when user inputs yes

java

while-loop

repeat