In the C family of languages, there are typically zero or two – or sometimes three – parameters on the int main() function. The first two are usually argc and argv. When there’s a third, it’s often envp.

• What happens when you add a fourth parameter apple?
• What if your compiler has a defined macro __APPLE__?
• What if apple’s not an int:
  • What if it’s a double pointer char **apple?
  • What if it’s a two-dimensional array char apple[][]?
  • What if the apple parameter’s an array of pointers char *apple[]?
    • What is the content of apple[0]?