std::basic_string::operator[]
From cppreference.com
< cpp | string | basic string
| reference operator[]( size_type pos ); |
(1) | |
| const_reference operator[]( size_type pos ) const; |
(2) | |
Returns a reference to the character at specified location pos. No bounds checking is performed.
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1) If pos == size(), the behavior is undefined.
2) If pos == size(), a reference to the character with value CharT() (the null character) is returned.
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(until C++11) |
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If pos == size(), a reference to the character with value CharT() (the null character) is returned. For the first (non-const) version, the behavior is undefined if this character is modified to any value other than charT(). |
(since C++11) |
Parameters
| pos | - | position of the character to return |
Return value
Reference to the requested character.
Complexity
Constant.
Example
Run this code
#include <iostream> #include <string> int main() { std::string const e("Exemplar"); for (unsigned i = e.length() - 1; i != 0; i /= 2) std::cout << e[i]; std::cout << '\n'; const char* c = &e[0]; std::cout << c << '\n'; // print as a C string //Change the last character of s into a 'y' std::string s("Exemplar "); s[s.size()-1] = 'y'; std::cout << s << '\n'; }
Output:
rmx Exemplar Exemplary
See also
| access specified character with bounds checking (public member function) |