size_type capacity() const; | (until C++11) | |
size_type capacity() const noexcept; | (since C++11) |
Returns the number of characters that the string has currently allocated space for.
(none).
Capacity of the currently allocated storage.
Constant.
#include <iostream>
#include <string>
void show_capacity(std::string const& s)
{
std::cout << "'" << s << "' has capacity " << s.capacity() << ".\n";
}
int main()
{
std::string s{"Exemplar"};
show_capacity(s);
s += " is an example string.";
show_capacity(s);
}Possible output:
'Exemplar' has capacity 15. 'Exemplar is an example string.' has capacity 30.
| returns the number of characters (public member function) |
|
| reserves storage (public member function) |
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