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In some library I’m using (written in C) its
StorePGM(image, width, height, filename)
char *image;
int width, height;
char *filename;
{
// something something
}
All functions are defined this way. I never seen such function definitions in my life. They seem to be valid to MSVC but when I compile it as C++ it gives errors.
What is it? some kind of old version C?
Yes. K&R, pre-standard C. Avoid using it.