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

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C++ Tutorial » Data Types » char functions

2.22.7.toupper and tolower

#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

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