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std::char_traits::compare

STD：：CHAR[医]特点：：比较

static int compare( const char_type* s1, const char_type* s2, std::size_t count ​(until C++17)
static constexpr int compare( const char_type* s1, const char_type* s2, std::size_t count ​(since C++17)

比较第一个count字符串的字符s1和s2.比较是按字典顺序进行的。

如果count是零，字符串被认为是相等的。

参数

s1, s2-pointers to character strings to compare
count-the number of characters to compare from each character string

返回值

负值s1是少于s2...

​0​如果s1是等于s2...

正值s1是大于s2...

例外

%280%29

复杂性

线性在count...

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