toupper and tolower : char functions « Data Types « C++ Tutorial






#include <iostream>
using std::cout;
using std::endl;

#include <cctype>
using std::islower;
using std::isupper;
using std::tolower;
using std::toupper;

int main()
{
   cout << "\nu converted to uppercase is " 
      << static_cast< char >( toupper( 'u' ) )
      << "\n7 converted to uppercase is " 
      << static_cast< char >( toupper( '7' ) ) 
      << "\n$ converted to uppercase is " 
      << static_cast< char >( toupper( '$' ) ) 
      << "\nL converted to lowercase is " 
      << static_cast< char >( tolower( 'L' ) ) << endl;

   return 0;
}
u converted to uppercase is U
7 converted to uppercase is 7
$ converted to uppercase is $
L converted to lowercase is l








2.22.char functions
2.22.1.Using functions isdigit
2.22.2.Using functions isalpha
2.22.3.Using functions isalnum
2.22.4.Using functions isxdigit
2.22.5.islower
2.22.6.isupper
2.22.7.toupper and tolower
2.22.8.isspace
2.22.9.iscntrl
2.22.10.ispunct
2.22.11.isprint
2.22.12.isgraph
2.22.13.Using strrchr: index a character in a string