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std::basic_string::front

From cppreference.com
< cpp‎ | string‎ | basic string
 
 
 
std::basic_string
 
CharT& front();
(since C++11)
const CharT& front() const;
(since C++11)

Returns reference to the first character in the string.

Contents

[edit] Parameters

(none)

[edit] Return value

reference to the first character, equivalent to at(0).

[edit] Complexity

Constant

[edit] Notes

front requires that !empty() == true, otherwise the result is undefined.

[edit] Example

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

Output:

exemplary
Exemplary

[edit] See also

(C++11)
accesses the last character
(public member function) [edit]