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std::basic_string::back

性病：基本[医]弦乐：：背

CharT& back(​(since C++11)
const CharT& back() const;​(since C++11)

返回对字符串中最后一个字符的引用。如果empty() == true...

参数

%280%29

返回值

引用最后一个字符，相当于operator[](size() - 1)...

复杂性

常量。

例

二次

#include <iostream>
#include <string>
 
int main()
{
  {
    std::string s("Exemplary"
    char& back = s.back(
    back = 's';
    std::cout << s << '\n'; // "Exemplars"
  }
 
  {
    std::string const c("Exemplary"
    char const& back = c.back(
    std::cout << back << '\n'; // 'y'
  }
}

二次

产出：

二次

Exemplars
y

二次

另见

front (C++11)accesses the first character (public member function)

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