C - 检查是否分配了整数 [英] C - Check if Integer is assigned

问题描述

如何判断整数是否未分配？

How do I determine if an integer is unassigned?

int i; /* no assignment */

if (/* conditional statement here to check if int i is unassigned or not */) {
   printf("Integer is unassigned!\n");
} else {
   printf("Integer is assigned!\n");
}

推荐答案

你不能。它将具有未定义内容，这意味着它将包含当时在该内存位置中发生的内容。

You can't. It will have "undefined" content, meaning it'll contain what ever happens to be in that memory location at that time.

。 。 。除非i在全局范围内声明，否则它将初始化为零。

. . . unless i is declared at the global scope, then it will be initialised to Zero.

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