Which is good, of course, in case some odd operating system decides that 74 is a good value to indicate success, and that 0 will be failure.

I'm not so sure. C can be easy, but some features require a lot of study to master. I'm not saying it is a diffucult language, but neither is it simple. I think the OP was referencing it to, say,...

Just one point: C is not a simple language. Also, your poll makes no sense.

1) This void main()
Should be int main( void )
2)Try to eliminate the nonstandard functions.

It would be nearly imposible to reconstruct C code as all compilers will compile it slightly different. Also, the same compiler might do it differently twice.

Main really should have a type: int main ( void )

Check out MSDN...

They are useful to organize large projects, often with over 100 files. It is easy to have them all in one organized list rather than scattered all over the folder.