Thread: toupper() function

Hi,

I am using toupper() on user input and then I want to display the answer after its been touppered.

But the program shows me the ascii value for the letter rather than the character. Even though I am using toupper() on a char variable.

Code:

#include <iostream>
//#include <ctype.h> // Makes the toupper function available to the compiler
using namespace std;

void main ()
{
	char userInput = ' ';

	cout << "Please enter a character: ";
	cin >> userInput;

	cout << "The letter you entered was: " << toupper(userInput) << endl;

}

2. On a different note. I am using VS 2005 express. Why is it that for some header files (eg, iostream) when I put the extension, the '.h' in with the name the compiler gives an error. And for other header files, if I dont put the '.h' I get an error. Not very consistent. IS the problem me? anyone tell me why this is?


Thanks for looking, your advice and help are appreciated

All C++ standard headers don't have an .h.
All C standard headers do have an .h.
Most headers from other libraries have an .h.
So for this program you would need <iostream> and <cctype>. (You could use the C standard header <ctype.h> instead, but that would be silly in a C++ program.)

toupper returns an int (it takes an int, too) which can be EOF.

thank you very much!!!