Mega Code Archive

Using functions islower, isupper, tolower, toupper

#include <iostream> #include <ctype.h> 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; }