using c++ in c code
<Hisssssss!>

You can use c in c++ but not c++ in c code. You can .cpp your c code and compile it fine. If you use c++ you have to .cpp your .exe compile.

You ask how you can solve your errors. Just .cpp your file. That should take care of most of your errors. Some are syntax errors with out seeing the code i can only guess what you did.