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Ctypedef d 数组 - 初始值是什么?
原标题:C typedef d array - What s the initial value?

我知道一个数组的初始值是 0, 如果定义为静态和未定义, 则是 0, 但我并不完全确定当数组是 typedef d. 我想是的, 但我想确认一下 。

说清楚一点,我的意思是这样的:

typedef float vector3[3];

int main (int argc, char* argv) {
    vector3 vec;
    static vector3 vec2;
}

vec 变量是没有定义的, 不是吗? vec2 怎么样? 它应该全部是0,对不对?

最佳回答

是的, vec 中的值将被不定义; vec2 中的值将是零。

使用 typedef 与定义或宣布变量时类型的行为没有区别。

问题回答

typedef s 绝对不影响代码的语义。 这包括初始值 。





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