A Little Help!?!?

[FunyBunyFartAHH]

Hey people, I need some help, I got a new book, and it tells right off the bat to do this to write out all the ASCII characters:

#include <iostream>

main <void>
{
    unsigned char ASCIIValue = 0;

    while (ASCIIValue < 256)
    
        std::cout.put (ASCIIValue);
        ASCIIValue ++;
    

    return 0;
} 

Ok so why the hell dose it not work, this book is using VC++, and im using the same complier, so could osme one plz tell me ***?

Gives errors do to ";" not being behind < or something.