I made a simple program in codelite with sfml（just a renderwindow and a circle on it; the code of which I copy from the example in the tutorial of setting up sfml in codeblcoks; exactly the same code..）, and when it runs, a blank window shows and then a messagebox pops up saying this program has no responding. I've add sfml to complier include and linker library. No error occurs when compiling and linking. How does this happen?
