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For循环计数器总是在C#递归函数中重置

.net c#

0

Xami Yen · 技术社区 · 7 年前

我有一个奇怪的问题,我没有完全明白。希望有人能解释一下。

public class Products{
    private int loopCounter=1;
    private int loop=10;
    public int ProductCount {get;set;}
    public int GetProducts(int Take, int Skip)
    {
        //code that sets ProductCount is removed
        for (int loopCounter = 1; loopCounter < loop; loopCounter++)
        {
            //Depending on ProductCount, Take and Skip values are
            //computed and passed to GetProducts. This code removed for brevity and am hard coding them
            GetProducts(10,5);
            //code to process GetProducts output removed
        }
    } 
}

3 回复 | 直到 7 年前

1

3

Hofma Dresu 7 年前

您正在创建和设置一个新的方法级变量 loopCounter 在for循环的开头,每次调用函数时。如果要使用类级别变量,应该删除for循环的第一部分(类似于 for(; loopCounter < loop; loopCounter++)

也就是说,我不建议像这样使用循环来控制递归。最好只使用一个循环,或者在到达边界条件时让GetProducts返回。

public class Products{
private int loopCounter=1;
private int loop=10;
public int ProductCount {get;set;}
public int GetProducts(int Take, int Skip)
{
    if(loopCounter >= loop) return;
    loopCounter++;
    //code that sets ProductCount is removed
    //Depending on ProductCount, Take and Skip values are
    //computed and passed to GetProducts. This code removed for brevity and am hard coding them
    GetProducts(10,5);
    //code to process GetProducts output removed
}

2

1

Ncs 7 年前

3

1

ThorPF 7 年前

我认为变量 loopCounter int loopCounter = 1 从for循环。

4

0

Suraj Rao Raas Masood 4 年前

如果希望返回递归函数调用的次数,或者换句话说,返回计数,那么这个代码示例将很有帮助。

public class Products{
    
    public int GetProducts(int Take)
    {
        // Check if you are ready to return the count.

        if (/* Some condition to check. */)
        {
           // Returned value will be 0, if you don't call method
           // recursive, which is equivalent to counter == 0.

           return 0;
        }
        
        // Do some stuff here and get result.

        // Returned value will be 1 + next value of the Method
        // call, which is whether 0 or 1 if recursion goes further.
        // All together, the end value will be the count of
        // recursive method calls.

        return 1 + GetProducts(result);
    } 
}