Материал из C\C++ эксперт
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string.resize()
#include <iostream>
using std::cout;
using std::endl;
using std::cin;
using std::boolalpha;
#include <string>
using std::string;
void display( const string & );
int main()
{
string string1;
cout << "Statistics before input:\n" << boolalpha;
display( string1 );
cout << "\n\nEnter a string: ";
cin >> string1; // delimited by whitespace
cout << "The string entered was: " << string1;
cout << "\nStatistics after input:\n";
display( string1 );
string1.resize( string1.length() + 10 );
cout << "\n\nStats after resizing by (length + 10):\n";
display( string1 );
return 0;
}
void display( const string &stringRef )
{
cout << "capacity: " << stringRef.capacity() << "\nmax size: "
<< stringRef.max_size() << "\nsize: " << stringRef.size()
<< "\nlength: " << stringRef.length()
<< "\nempty: " << stringRef.empty();
}
/*
Statistics before input:
capacity: 0
max size: 1073741820
size: 0
length: 0
empty: true
Enter a string: a string
The string entered was: a
Statistics after input:
capacity: 1
max size: 1073741820
size: 1
length: 1
empty: false
Stats after resizing by (length + 10):
capacity: 11
max size: 1073741820
size: 11
length: 11
empty: false
*/
