1

我有一个非常简短（而且几乎是菜鸟）的问题。我有一个功能，包括：

void function(int x)
{
    x = 3;
    if (x == 4)
        printf("HI!");
    x = 4;
}

HI!会打印单词吗？换句话说，一个 C 程序是按顺序读取的吗？

非常感谢！

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2 回答 2

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No, the code compiles to a sequence of instructions which happen sequentially one after the other. The comparison to 4 will always before the assignment x = 4. So it will be false.

This type of order is guaranteed when you are dealing with a single thread. When you have multiple threads you can get strange results and race-conditions unless you are careful.

于 2013-06-25T00:30:30.787 回答
0

It will not be printed. The line above is what matters of course.

于 2013-06-25T00:29:27.680 回答