yndfcd wrote: So,What do you think of this problem?Does this create problems? What do use when you a beginner? And What compiler do you think is suitable for a beginner? Borland Turbo C was the first C compiler I purchased. I loved it. Wouldn't be where I am today without having gone down that road. From there, I went to Borland Turbo C++, then to Microsoft C, and finally to Microsoft Visual C++. A tool is what you make of it. When navigating the stones, skipping the smaller, intermediate stones is not always a good idea. Five birds are sitting on a fence. Three of them decide to fly off. How many are left?