Two 'main' functions in C/C++

Question

Can I write a program in C or in C++ with two main functions?

Answer 1

What do you mean by "main function"? If you mean the first function to execute when the program starts, then you can have only one. (You can only have one first!)

If you want to have your application do different things on start up, you can write a main function which reads the command line (for example) and then decides which other function to call.