除以零警告

Question

我的程序中有一个除零异常的问题.我尝试了几个技巧,但都没有奏效.我应该在代码中更改什么以避免除以零？

我知道我必须在代码的"IF"部分添加一些额外的语句,但我仍然不知道到底应该做什么.

for (counter = 0; counter < numbers.Length; counter++)
{
    string input = Console.ReadLine();

    if(string.IsNullOrEmpty(input))
    {
        break;
    }
    else
    {
        int.TryParse (input, out numbers[counter]);
    }
}

for (int i = 0; i < numbers.Length; i++) {
    sum += numbers [i];

    if (numbers [i] % 3 == 0 && numbers [i] % 9 != 0) {
        div3not9++;
    }

    if (numbers [i] >= 11 && numbers [i] <= 131 && (numbers [i] * numbers [i] % 7 == 0) && (numbers [i] * numbers [i] % 3 != 0)) {
        range11to131sqdiv7not3++;
        SUMrange11to131sqdiv7not3 += numbers [i];

        if (range11to131sqdiv7not3 > 0) {
            mean = SUMrange11to131sqdiv7not3 / range11to131sqdiv7not3;
        }
            else
                mean = 0;
        }

    }

for (int y = 0; y < numbers.Length; y++) {
    if (numbers [y] > 0)
        min = numbers [y];
}
for (int r = 0; r < numbers.Length; r++) {
    if (numbers [r] < min && numbers [r] > 0)
        min = numbers [r];

    if (numbers [r] % min == 0) {
        divmin++; // DIVISION BY ZERO EXCEPTION
    }

    if (sum % numbers [r] == 0) {
        divisorsofsum++;  // DIVISION BY ZERO EXCEPTION
    }
}

Answer 1

除以零是由您使用%运算符引起的.此运算符返回除法的余数,因此如果第二个操作数为零,则会失败.

因此,如果

numbers[r] % min

导致零除错误,然后min为零.你需要特别对待这个案子.并且类似地用于%操作员的其他用途.