after trying to debug, the system said that it is unable to start the program as the system cannot find the file specific. anyone know how to solve this ?
I see that you are using "visual c++ 2010 express". I have had a similar problem using "VS 2015". Sometimes I solved the problem by using "Windows Explorer" to find the "Debug" directory for the project and manually delete the .exe and .obj file before I could compile and get it to run.
I think I had one project where I had to scrap the whole project and create a new project before it all worked.
Try deleting the files manually first and see what happens.