On Nov 7, 2007 5:23 PM, Matthieu Brucher <matthieu.brucher@gmail.com> wrote:
I don't understand. I'm thinking of most math functions in the C-library. In C a boolean is just an integer of 0 or 1 (quasi, by definition).
Could you explain what you mean ?
In C++, bool is a new type that has two values, true and false. If you add true and true, it is still true, and not 2. In C, everything that is not 0 is true, not in C++.
Yes, I know this. But my situation is "the other way around". Lets say I want to count "foreground pixels" in an image: I would want to "sum" all the true values, i.e. a true *is* a 1 and a false *is* a 0. In other words, I'm really thinking of (older kind of) C, where there *was* no bool. I assume this thinking still applies to the internal arithmetic of CPUs today. Also the "bit-values" of a boolean array (in memory) are set this way already anyway ! How can I simply call my functions looking at these bit values ? (essentially interpreting a boolean true as 1 and false as 0) -Sebastian