void resize ( size_t n, char c );
void resize ( size_t n );

Resize string

Resizes the string content to n characters.

If n is smaller than the current length of the string, the content is reduced to its first n characters, the rest being dropped.

If n is greater than the current length of the string, the content is expanded by appending as many instances of the c character as needed to reach a size of n characters.

The second version, actually calls: resize(n,char()), so when a string is resized to a greater size without passing a second argument, the new character positions are filled with the default value of a char, which is the null character.

Parameters

n

New size for the string, expressed in characters.
size_t is an unsigned integral type.

c

Character to be used to fill any additional character space in the string.

Return Value

If the requested size is greater than the maximum size (string::max_size) a length_error exception is thrown.

Example

// resizing string
#include <iostream>
#include <string>
using namespace std;

int main ()
{
  size_t sz;
  string str ("I like to code in C");
  cout << str << endl;

  sz=str.size();

  str.resize (sz+2,'+');
  cout << str << endl;

  str.resize (14);
  cout << str << endl;
  return 0;
}

Output:

I like to code in C
I like to code in C++
I like to code

Basic template member declaration

typedef typename Allocator::size_type size_type;
void resize( size_type n, charT c );
void resize( size_type n );

See also