c# - 错误CS1525为什么会发生？

Question

我不知道为什么，但是当我尝试编译下一个代码时，我得到错误CS1525，并且每个while命令结尾的每个)都被标记为错误:

static void PrintArray(string[] arr)
{
    int i, sum = 0, subb = 0, pow, x;
    char opper;
    Console.WriteLine("how many numbers does your calculation have?");
    i = Convert.ToInt16(Console.ReadLine());
    arr = new string[i];
    for (i = 0; i < arr.Length; i++)
    {
        Console.WriteLine("enter num {0}" + i);
        arr[i] = Console.ReadLine();
        Console.WriteLine("arr[{0}] = {1}" + i, arr[i]);
    }
    Console.WriteLine("what do you want to do?");
    opper = Convert.ToChar(Console.ReadLine());
    while (opper = +)
    {
        for (i = 0; i < arr.Length; i++)
        {
            sum = sum + Convert.ToInt16(arr[i]);
        }
        Console.WriteLine("your sum is " + sum);
    }
    while (opper = -)
    {
        for (i = 0; i < arr.Length; i++)
        {
            subb = subb + Convert.ToInt16(arr[i]);
        }
        Console.WriteLine("your subb is" + subb);
    }
    while (opper = *)
    {
        pow = Convert.ToInt16(arr[0]);
        for (i = 1; i < arr.Length; i++)
        {
            pow = pow * Convert.ToInt16(arr[i]);
        }
        Console.WriteLine("the resolt is " + pow);
    }
    while (opper = &)
    {
        x = Convert.ToInt16(arr[i]);
        for (i = 0; i < arr.Length; i++)
        {
            x = x / Convert.ToInt16(arr[i]);
        }
        Console.WriteLine("your resolt is " + x);
    }
        Console.ReadKey();
}

如果有人最终可以向我解释这一点，我将感到非常高兴。

Answer 1

给定线(例如)

opper = Convert.ToChar(Console.ReadLine());
while (opper = +)

您似乎正在尝试将字符输入与运算符进行比较。您需要将赋值运算符更改为比较运算符，然后将该字符与另一个字符进行比较，如下所示:

opper = Convert.ToChar(Console.ReadLine());
while (opper == '+')