Logical OR operator

Mikkel Bugge · 2012-02-23T08:35:52

Hello. I'm currently reading the Primer Plus 5th Edition. I'm currently stuck at the listing 6.4. It goes something like this, #include <iostream> int main() { using namespace std; cout << "This program may reformat your hard disk\n" "and destroy all your data.\n" "Do you wish to continue? <y/n> "; char ch; cin >> ch; if (ch == 'y' || 'Y') cout << "You were warned!\a\a\n"; else if (ch == 'n' || 'N') cout << "A wise choice ... bye\n"; else cout << "That wasn't a y or n, so I guess I'll " "trash your disk anyway.\a\a\a\n"; return 0; } The problem is, no matter what the input will be, the program will always execute the first if-loop. So an input of 'n' or 'a' will result in the output "You were warned!". I have encountered this problem with the or operator in my own programs (On two different computers actually), and often thought I was just misusing it, but somehow I wonder if it's not me, and maybe some kind of bug? I suspect the OR operator since, if I remove it in all of the loops and leave only one char for each loop ('y' and 'N' for instance), the problem will disappear. I am using Code::Blocks 10.05 (rev 6283) with the GNU GCC version 0.99 compiler (Which came with the Code::Blocks bundle). Hope someone can explain what is happening here. Best regards, Boooke