Question

所以我做了一个while循环，要达到12个等级。计数器从0开始。在Main()方法中，我调用函数gradeFunction()，但执行完该函数后，计数器没有任何变化。

Program p = new Program();
string name = Console.ReadLine();
int gradesPassed = 12;
int currentGrade = 0;
double totalSumOfGrades = 0;
while(currentGrade <= gradesPassed)
{
    double finalGrade = double.Parse(Console.ReadLine());
    p.gradeFunction(finalGrade, totalSumOfGrades,     currentGrade);
}

被调用函数：

public void gradeFunction(double finalGrade, double totalSumOfGrades, int currentGrade)
{
    if(finalGrade >= 4.00)
    {
       totalSumOfGrades += finalGrade;
       currentGrade++;
    }

}

Answer 1

代码

    Console.ReadLine();
    double totalSumOfGrades = 0;

    for(var currentGrade = 0; currentGrade <= 12; currentGrade++)
    {
        var finalGrade = double.Parse(Console.ReadLine());
        if (finalGrade >= 4.00)
        {
            totalSumOfGrades += finalGrade;
        }
    }

将更简单，更直接。

Answer 2

就像@杰里米（Jeremy）所说，请尝试以下操作：

Program p = new Program();
string name = Console.ReadLine();
int gradesPassed = 12;
int currentGrade = 0;
double totalSumOfGrades = 0;
while (currentGrade <= gradesPassed)
{
    double finalGrade = double.Parse(Console.ReadLine());
    gradeFunction(finalGrade, ref totalSumOfGrades, ref currentGrade);
}

public static void gradeFunction(double finalGrade, ref double totalSumOfGrades, ref int currentGrade)
        {
            if (finalGrade >= 4.00)
            {
                totalSumOfGrades += finalGrade;
                currentGrade++;
            }

        }

我在调用和声明上都添加了currentGrade和totalSumOfGrades的ref关键字，以便正确更新变量，我认为这是使代码正常工作的最无影响的方法

该函数在while循环中不响应计数器

2 个答案: