Question

我正在设计一个项目，将用户结果与标准结果进行比较。我的算法无法完全按照我希望的方式运行（评分系统）。我的代码的问题在于，它根本不会以我希望的方式运行。它只会从第一个“ while”和“ if”条件中读取。它根本无法识别其他条件。年龄和分数将通过外部来源提供，因此这只是该工具的算法/评分系统。

import java.util.Scanner;

public class algorithm_tester {

    int score;

    int age;

    public static void main(String[] args) {

        int score = 0;
        int age = 0;

        Scanner input = new Scanner(System.in);

        //User Inputs Score
        System.out.print("Enter Your Score: ");
        int myscore = input.nextInt();
        System.out.println("Score entered = " + myscore);

        //User Inputs Age
        System.out.print("Enter Your Age: ");
        int myAge = input.nextInt();
        System.out.println("Age entered = " + myAge);

        while (age < 30) {

            if (score < 15) {
                System.out.println("Your Score Is Slightly Abnormal For Your Age.");
            } else if (score < 10) {
                System.out.println("Your Results Are Rather Low. Therefore, We Recommend You Seek Medical Advice.");
            } else if (score < 8) {
                System.out.println("Your Results Suggest Severe Cognitive Impairment. You Must Seek Medical Attention Immediately.");
            } else {
                System.out.println("Well Done! You Scored Very Well.");
            }

            while (age < 40) {

                if (score < 14) {
                    System.out.println("Your Results Are Slightly Abnormal For Your Age.");
                } else if (score < 10) {
                    System.out.println("We Recommend You Seek Medical Advice As Your Results Are Quite Low.");
                } else if (score < 7) {
                    System.out.println("Your Score Is Very Low. We Believe You May Have Experienced Majoe Cognitive Impairment. We Recommend You Seek Immediate Medical Attention.");
                } else {
                    System.out.println("Well Done! You Have Shown No Evidence Cognitive Impairment");
                }

                while (age < 60) {

                    if (score < 12) {
                        System.out.println("Your Results Are Slightly Abnormal For Your Age.");
                    } else if (score < 9) {
                        System.out.println("Your Score is Very Low. We Believe This Is Due To Minor Cognitive impairment. We Recommend You Seek Medical Advice.");
                    } else if (score < 6) {
                        System.out.println("Your Results Have Led Us to Believe You Have Suffered Severe Cognitive Impairment. You Must Seek Medical Attention Immediately.");
                    } else {
                        System.out.println("Congratulations! Your Results Were Excellent. You Have Shown No Evidence Of Cognitive Impairment");
                    }

                    while (age < 80) {

                        if (score < 10) {
                            System.out.println("Your Results Are Slightly Abnormal For Your Age.");
                        } else if (score < 7) {
                            System.out.println("Your Score is Very Low. We Believe This Is Due To Minor Cognitive impairment. We Recommend You Seek Medical Advice.");
                        } else if (score < 5) {
                            System.out.println("Your Results Have Led Us to Believe You Have Suffered Severe Cognitive Impairment. You Must Seek Medical Attention Immediately.");
                        } else {
                            System.out.println("Congratulations! Your Results Were Excellent. You Have Shown No Evidence Of Cognitive Impairment");
                        }

                        while (age > 80) {

                            if (score < 10) {
                                System.out.println("Your Results Are Slightly Abnormal For Your Age.");
                            } else if (score < 6) {
                                System.out.println("Your Score is Very Low. We Believe This Is Due To Minor Cognitive impairment. We Recommend You Seek Medical Advice.");
                            } else if (score < 4) {
                                System.out.println("Your Results Have Led Us to Believe You Have Suffered Severe Cognitive Impairment. You Must Seek Medical Attention Immediately.");
                            } else {
                                System.out.println("Congratulations! Your Results Were Excellent. You Have Shown No Evidence Of Cognitive Impairment");
                            }
                        }
                    }
                }
            }
        }
    }
}

Answer 1

那是因为您的while循环是无限循环，并且因为您应该颠倒if语句的顺序。您永远不会在任何循环内获得用户输入，因此无法更改值。例如，age < 30一旦age 总是小于30，则此循环将永远不会结束，它将永远不会运行程序的任何其他部分在特定的while循环中。

为此，您目前正在将age和score硬编码为0，并且从不更改它们-我假设您想在这里获得用户输入或其他信息。

不过，while循环对于您要实现的目标根本没有意义。您实际上应该使用嵌套的if语句，如下所示：

if (age < 30) {
   if (score < 8) {
      // ...
   }
   else if (score < 10) {
      // ...
   }
   // Etc.
}
else if (age < 40) {
   // ...
}
else if (age < 60) {
   // ...
}
// Etc.

如果您要重复整个程序直到用户输入特定值（例如 then ），则将整个程序放入while循环中进行检查是很有意义的。用户输入的值。

还要注意，我颠倒了嵌套if语句的方向。如果分数小于8，则分数也将小于10且小于15，因此您要先检查分数是否小于8。

Answer 2

您正在输入“ myscore”和“ myage”变量，而if和while条件完全基于不同的变量“ age”和“ score”，因为您为其分配了零，所以它总是到第一个if和while并且您的算法不起作用把age = myage //输入后和分数= myscore //输入分数后

我的代码忽略了后续的if和while条件

2 个答案: