Question

我的程序中有一个逻辑错误。如果我输入数据，程序会正确编译; 3名学生，詹姆斯100，瑞奇98，埃里克70.如果我进入詹姆斯100，埃里克70和瑞奇98，它显示詹姆斯和埃里克作为顶级学生，这是不正确的任何帮助将不胜感激。

    import java.util.Scanner;

public class FindHighestScores {
    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    String studentName = "";
    String topStudentName = "";
    String top2ndStudentName = "";
    int grade = 0;
    int topStudentGrade = 0;
    int top2ndStudentGrade = 0;
    int studentNumber = 0;

    System.out.print("Enter the number of students: ");
    studentNumber = input.nextInt();

    System.out.print("Enter a student name: ");
    topStudentName = input.next();

    System.out.print("Enter a students score: ");
    topStudentGrade = input.nextInt();

    System.out.print("Enter a student name: ");
    top2ndStudentName = input.next();

    System.out.print("Enter a students score: ");
    top2ndStudentGrade = input.nextInt();

    int count = 2;

    while (count < studentNumber) {

        System.out.print("Enter a student name: ");
        studentName = input.next();

        System.out.print("Enter a students score: ");
        grade = input.nextInt();

        if (grade > topStudentGrade) {
            grade = topStudentGrade;
            studentName = topStudentName;
        }
        if (grade > top2ndStudentGrade) {
            grade = top2ndStudentGrade;
            studentName = top2ndStudentName;
        }
        count++;
    }
    System.out.println("Top two students:" );

    System.out.println(topStudentName + "'s score is " + topStudentGrade);

    System.out.println(top2ndStudentName + "'s score is " + top2ndStudentGrade);
    input.close();
    }
}

Answer 1

你的问题在这里：

 if (grade > topStudentGrade) {
        grade = topStudentGrade;
        studentName = topStudentName;
    }
    if (grade > top2ndStudentGrade) {
        grade = top2ndStudentGrade;
        studentName = top2ndStudentName;
    }

应该是：

 if (grade > topStudentGrade) {
        topStudentGrade = grade; // these are backwards
        topStudentName = studentName;
    }else if (grade > top2ndStudentGrade) {
        top2ndStudentGrade = grade; //backwards again
        top2ndStudentName = studentName;
    }

将第二个语句设为else if语句，否则您将获得相同的结果。如果它不是最高的那么你和看它是否是第二高的。

我也会改变你接近输入的方式。获得学生人数后，创建一个循环，让每个学生的姓名和分数。然后，您可以编写另一个传递学生数组的函数，该函数将检查最高分。

此外，count应设置为0：count = 0;

你不需要任何这个，就像它目前的设置方式一样：

//This is the first set of inputs at the beginning of your program.
    System.out.print("Enter the number of students: ");
studentNumber = input.nextInt();

System.out.print("Enter a student name: ");
topStudentName = input.next();

System.out.print("Enter a students score: ");
topStudentGrade = input.nextInt();

System.out.print("Enter a student name: ");
top2ndStudentName = input.next();

System.out.print("Enter a students score: ");
top2ndStudentGrade = input.nextInt();

循环语句程序中的逻辑错误

1 个答案: