Hi;

I'm trying to use the C++ compiler included with OS X (command line -- not Project Builder) to develop programs for a first-year computer science course. I've run into an elementary problem. If I do something like:

cout << "Enter a number: " ;
cin >> n;

nothing appears on the console until I type a number and hit return. Then, the "enter a number text is displayed" and the program continues. If I compile the same program on Solaris 5 this does not happen.

Any ideas?

Thanks.

[Dalgo]

You need to flush the output buffer before you take input. Usually compilers will do that for you when they encounter a cin after a cout, but don't count on it. In order to do that you'd write it like this:

cout << "Enter a number: " << flush;
cin >> n;

Or, if you want it to flush the buffer and move down to the next line you'd use endl instead of flush.

Curious. Appending " << endl" to the cout works, but " << flush" seems to do nothing.

[Dalgo]

Yea, I just tried it. It doesn't seem to work with flush. It's strange that it doesn't produce any error either. I looked in iostream.h and flush is defined there. I don't know why it doesn't seem to work. Maybe Apple's iostream library isn't very good. At least endl works. I usually use stdio.h anyway, so I never noticed that it didn't work on my computer before this.

[exrae]

When mixing input types (numerics and strings..)
You'll want to put a cin.ignore('\n',100); after
your cout

Maybe that'll do the trick!