Global Variables

Projects Programming
1

So I am working on a project right now invloving waiting for input from some buttons. I have this function input, and I want to have a state machine for polling and waiting for someone to lift up from the button. I created some global variables for those states but I get an error.

A couple things to consider: This is a pretty big program -- I have 4 tabs. Im not sure if global variables need to go anywhere specific or if they just need to be outside of any function. I am using const int rather than #define because const int seems to be more versatile and safe.

Heres the code I am working with:

//////////////// input states\\\\\\\\\\\\\\\\\
const int POLL = 0;
const int PRESSED = 1;
const int MULTIPRESSED = 2;
const int LIFTED = 3;
const int CANCELED = 4;
//\\\\\\\\\\\\\\\\\\\\\/////////////////////////

int input(){
  // This function waits for an input and returns the executed button
  // returns:
  // 0 = thumb
  // 1 = pointer
  // 2 = middle
  // 3 = ring
  // 4 = pink
  
  int inputstate = POLL;
  int buttons[5];
  int button;
  int pressed;
  
  while(1)
  {
    // read buttons and switch(inputstate)  etc
  }
}

This is just the code from one of the tabs. I have other tabs and in my loop() this function, input() gets called. When I verify this program i get the error: 'POLL' was not declared in this scope, highlighting the line "int inputstate = POLL;"

Any ideas why this is and what I might do to fix it?

Thanks

Chet

2

Lose the \\!

3

lol. duh. How do you section off your code to make it more readable?

4

How do you section off your code to make it more readable?

Backslashes are continuation characters. That's why you can't use them.

/* ====================
    Some useful notes here
    ==================== */

or

// ========================
// Some description goes here
// ========================

are a couple of ways that I use.