本帖最后由 john_lee 于 2011-3-18 13:22 编辑
肯定会的，这是C99标准规定的。C99原文摘录：
If an object that has automatic storage duration is not initialized explicitly, its value is indeterminate. If an object that has static storage duration is not initialized explicitly, then:
— if it has pointer type, it is initialized to a null pointer;
— if it has arithmetic type, it is initialized to (positive or unsigned) zero;
— if it is an aggregate, every member is initialized (recursively) according to these rules;
— if it is a union, the first named member is initialized (recursively) according to these rules.
翻译：
如果一个具有自动存储持续时间（生命期）的对象不显式初始化，它的（初始）值是不确定的。如果一个具有静态存储持续时间（生命期）的对象不显式初始化，那么：
- 如果它有指针类型，它是初始化为空指针;
- 如果它有算术类型，它被初始化为（正或无符号）零;
- 如果它是一个聚合（结构），每一个成员根据本规则被（递归地）初始化;
- 如果它是一个联合，第一个命名的成员根据本规则被（递归地）初始化。 |
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