char_traits::lt

Tests whether one character is less than another.

static bool lt(
   const char_type& _Ch1, 
   const char_type& _Ch2 
);

Parameters

• _Ch1
  The first of two characters to be tested for less than.

• _Ch2
  The second of two characters to be tested for less than.

Return Value

true if the first character is less than the second character; otherwise false.

Example

// char_traits_lt.cpp
// compile with: /EHsc
#include <string>
#include <iostream>

int main( ) 
{
   using namespace std;
   char_traits<char>::char_type ch1 =  'x';
   char_traits<char>::char_type ch2 =  'y';
   char_traits<char>::char_type ch3 =  'z';

   // Testing for less than
   bool b1 = char_traits<char>::lt ( ch1 , ch2 );
   if ( b1 )
      cout << "The character ch1 is less than "
           << "the character ch2." << endl;
   else
      cout << "The character ch1 is not less "
           << "than the character ch2." << endl;

   // An equivalent and alternatively test procedure
   if ( ch3 <  ch2 )
      cout << "The character ch3 is less than "
           << "the character ch2." << endl;
   else
      cout << "The character ch3 is not less "
           << "than the character ch2." << endl;
}

The character ch1 is less than the character ch2.
The character ch3 is not less than the character ch2.

Requirements

Header: <string>

Namespace: std

See Also

Concepts

char_traits Struct

char_traits Members