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Asked by Sweetu Last Modified
Answer 
Aman Mishra
Tutor
No, main() can only return int. The reason being it is the way C/C++ is built. If you are still not convinced then the more detailed answer would be that because the result value of main() is passed to the exit() system call on UNIX systems.
The exit() system call takes a single integer argument which is stored in the PID info record in the kernel, and can then be retrieved by the calling process when they call one of the wait() family of system calls.
This method of passing a return code through the PID info has been around since the earliest days of UNIX, which was written in C.
In UNIX, processes typically return a success/failure code in this space, so that the calling process. Making the return code from main() the same value is just a simple shortcut.
But then I know you didn't get anything, that is why I wrote in the simplest way in the First few line of the answer.
Do not forget to like my answer in case I solved your doubt. "Like" keeps me motivated.
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