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注意!当size_t和int在比较时,会先将int转换成无符号整形,然后再做比较,当int为负数时,就会产生一个大正数,导致逻辑出现异常,常见示例如下:
size_t
int
int len = 0; for (size_t i = 0; i < len - 1; i++) { ...... }