but i still gt this error.... i can't run the build and run the program. the default compiler is GNU GCC compiler.
Well - the error message is pretty clear and originating from YOUR system. The directory you are trying to use is either set read-only, not accessible or you don't have sufficient rights to write into it. Check your access rights and output folder settings of the project. If you are developing a virus, your AV software might also cause this.
Next time please also accept our forum rules by posting what OS / OS version you are using. Also enabling the full compiler log might help.