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?
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?
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。
typedef
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