// Justin C. Miller
// University of Wisconsin Oshkosh
// Made for: http://www.geocities.com/neonprimetime.geo/index.html
// Date: 2001
// Borland Builder 4.0

// toupper()  and  tolower()
#include 
#include   // must include ctype.h
		// to use toupper and tolower

int main()
{
	char myfirstletter = 'a' ;
	
	// toupper converts a lowercase letter to uppercase
	char printitout = toupper(myfirstletter) ;
	cout << printitout << endl ;

	char mysecondletter = 'B' ;
	
	// tolower converts a uppercase letter to lowercase
	printitout = tolower(mysecondletter) ;
	cout << printitout << endl ;
	return 0 ;
}

// output is
// A
// b

    Source: geocities.com/neonprimetime.geo/cpp/cpp_SourceCode

               ( geocities.com/neonprimetime.geo/cpp)                   ( geocities.com/neonprimetime.geo)