Codeblocks下运行C++的程序时，偶尔会出现 Cannot open output file, permission denied 的问题，导致不能够编译。
在 Stack Overflow 上看到有过类似的遭遇。 链接地址
I have encountered the same problem you have. I found that it may have some relationship with the way you terminate your run result. When you run your code, whether it has a printout, the debugger will call the console which print a "Press any key to continue...". If you terminate the console by pressing key, it's ok; if you do it by click the close button, the problem comes as you described. When you terminate it in the latter way, you have to wait several minutes before you can rebuild your code.