std::basic_string::find_last_of
size_type find_last_of( const basic_string& str, size_type pos = npos ) const; | (1) | |
|---|---|---|
size_type find_last_of( const CharT* s, size_type pos, size_type count ) const; | (2) | |
size_type find_last_of( const CharT* s, size_type pos = npos ) const; | (3) | |
size_type find_last_of( CharT ch, size_type pos = npos ) const; | (4) | |
size_type find_last_of( std::basic_string_view<CharT, Traits> sv, size_type pos = npos) const | (5) | (since C++17) |
查找与给定字符序列中的一个字符相等的最后一个字符。未指定精确搜索算法。搜索只考虑间隔。0；pos如果字符不在间隔中，npos会被归还。
1%29查找最后一个字符，该字符与str...
2%29发现最后一个字符等于第一个字符中的一个。count所指向的字符串的字符。s...s可以包含空字符。
3%29查找最后一个字符，该字符与s字符串的长度由第一个空字符决定。
4%29找到最后一个等于ch...
5%29查找最后一个字符，该字符与sv...
在所有情况下，都通过调用特征：情商...
参数
str | - | string identifying characters to search for |
|---|---|---|
pos | - | position at which the search is to finish |
count | - | length of character string identifying characters to search for |
s | - | pointer to a character string identifying characters to search for |
ch | - | character to search for |
sv | - | std::basic_string_view identifying the characters to search for |
返回值
已发现字符的位置或npos如果找不到这样的角色。
例外
1-4) (none) | (until C++11) |
|---|---|
1,4) noexcept specification: noexcept 2,3) (none) | (since C++11)(until C++14) |
1) noexcept specification: noexcept 2,3,4) (none) | (since C++14) |
5) noexcept specification: noexcept | (since C++17) |
例
二次
#include<string>
#include<iostream>
int main()
{
const std::string path="/root/config";
auto const pos=path.find_last_of('/');
const auto leaf=path.substr(pos+1);
std::cout << leaf << '\n';
}二次
产出：
二次
config二次
另见
find | find characters in the string (public member function) |
|---|---|
rfind | find the last occurrence of a substring (public member function) |
find_first_of | find first occurrence of characters (public member function) |
find_first_not_of | find first absence of characters (public member function) |
find_last_not_of | find last absence of characters (public member function) |
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