std::basic_string<CharT,Traits,Allocator>::front
CharT& front(); | (since C++11) | |
const CharT& front() const; | (since C++11) |
Returns reference to the first character in the string. The behavior is undefined if empty() == true.
Parameters
(none).
Return value
reference to the first character, equivalent to operator[](0).
Complexity
Constant.
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
See also
|
(C++11) | accesses the last character (public member function) |
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