Thread: return to the main()

I have a main program with a switch statement, and each case pulls up a function which is a program, how, once the function is run, go back to the main program? So like if the program asks me what I want to do, and I say I want to goto a calculator, and then I finish adding my numbers, how do I go back to the program and be able to pick a different choice, like a game.

Code:

int main(void)
{
 while(1)
 {
  switch(blah)
  {
   blah blah
  }
 }
 return 0;
}

Put your switch in a loop controlled by user input.