未初始化的局部变量'j' [英] uninitialized local variable 'j' used

问题描述

这是我有一些代码的一部分。我得到一个未初始化的局部变量'j'的错误，我看不到它。据我所知，它正在被使用。有人可以帮忙吗？

Here is a section of some code I have. Im getting an error uninitialized local variable 'j' used and I dont see it. as far as I can tell it is being used. Can someone please help?

float Calculate(Element ElmAry[30], Formula FormAry[30])
{
    int i;
    int j;
    float MoleWT = 0;
    float MoleSum = 0;
    char e1;
    char e2;
    char f1;
    char f2;

    for(i = 0; i < 30; i++) {

        f1 = FormAry[j].Element1;
        f2 = FormAry[j].ElementA;
        e1 = ElmAry[i].eN1;
        e2 = ElmAry[i].eN1;

        if(e1 == f1 && e2 == f2) {
            MoleWT = ElmAry[i].Weight * FormAry[j].Atom;
            MoleSum = MoleSum + MoleWT;
            j++;
        }
    }

return MoleSum;
}

推荐答案

错误不是正在使用 j 。错误是 j 正在使用，但没有被初始化。

The error isn't that j is being used. The error is that j is being used but it isn't being initialized.

我建议更改你的 for 循环到：

I suggest changing your for loop to:

for(i=0, j=0; i < 30; i++, j++)

由于我认为这可能是你实际想要的做...

As I think this is probably what you're actually trying to do...

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