C++ In a Nutshell

Name

operator+ function template — Concatenates two strings

Synopsis

template<class charT, class traits, class Allocator>
  basic_string<charT,traits,Allocator> operator+(
    const basic_string<charT,traits,Allocator>& a,
    const basic_string<charT,traits,Allocator>& b);
// string& operator+(const string& a, const string& b);
template<class charT, class traits, class Allocator>
  basic_string<charT,traits,Allocator> operator+(const charT* a,
  const basic_string<charT,traits,Allocator>& b);
// string& operator+(const char* a, const string& b);
template<class charT, class traits, class Allocator>
  basic_string<charT,traits,Allocator> operator+(
   const basic_string<charT,traits,Allocator>& a, const charT* b);
// string& operator+(const string& a, const char* b);
template<class charT, class traits, class Allocator>
  basic_string<charT,traits,Allocator> operator+(
    const basic_string<charT,traits,Allocator>& a, charT b);
// string& operator+(const string& a, char b);

The + operator concatenates two strings and returns the result. It constructs a new string as a copy of a, then calls a.append(b) and returns the copy.

See Also

basic_string class template