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std::char_traits::length

From cppreference.com
< cpp‎ | string‎ | char traits
Revision as of 01:52, 8 September 2013 by Ruslo (Talk | contribs)

static std::size_t length( const char_type* s );

Returns the length of the character sequence pointed to by s, that is, the position of the terminating null character (Char()).

Contents

Parameters

s - pointer to a character sequence to return length of

Return value

The length of character sequence pointed to by s.

Exceptions

(none)

Complexity

Linear.

Example

#include <iostream>
 
void print(const char* str)
{
  std::cout << "string '" << str << "' ";
  std::cout << "length = " << std::char_traits<char>::length(str) << '\n';
}
 
int main()
{
  print("foo");
 
  std::string s("booo");
  print(s.c_str());
}

Output:

string 'foo' length = 3
string 'booo' length = 4