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# 2-1 malloc字符串(p28)

无论在什么时候执行这样一条语句 `malloc(strlen(str))` 基本上可以断定它是错的，因为字符串处理函数一般都包含一个额外空间，用于容纳 **'\0'** 字符

正确应是 `malloc(strlen(str) + 1)`