When debugging a visual c+ program, the file specified can't be executed

I made a simple hello world program. I clicked on "Start Debugging" and the window showed "Project is out of date. Would you like to build it?" As I click on "yes", the next window shows "There were build errors. Would you like to continue and run the last successful build?". I choose yes again, and it shows this window: (attached screenshot)enter image description here