#include
#include
using namespace std;
int main()
{
cout << "According to islower:\n"
<< ( islower( 'p' ) ? "p is a" : "p is not a" )
<< " lowercase letter\n"
<< ( islower( 'P' ) ? "P is a" : "P is not a" )
<< " lowercase letter\n"
<< ( islower( '5' ) ? "5 is a" : "5 is not a" )
<< " lowercase letter\n"
<< ( islower( '!' ) ? "! is a" : "! is not a" )
<< " lowercase letter\n";
cout << "\nAccording to isupper:\n"
<< ( isupper( 'D' ) ? "D is an" : "D is not an" )
<< " uppercase letter\n"
<< ( isupper( 'd' ) ? "d is an" : "d is not an" )
<< " uppercase letter\n"
<< ( isupper( '8' ) ? "8 is an" : "8 is not an" )
<< " uppercase letter\n"
<< ( isupper('$') ? "$ is an" : "$ is not an" )
<< " uppercase letter\n";
cout << "\nu converted to uppercase is "
<< ( char ) toupper( 'u' )
<< "\n7 converted to uppercase is "
<< ( char ) toupper( '7' )
<< "\n$ converted to uppercase is "
<< ( char ) toupper( '$' )
<< "\nL converted to lowercase is "
<< ( char ) tolower( 'L' ) << endl;
return 0;
}