Does pre-compilation control work in vex-code pre4.0

[hemm]

Here is my directory …

I’m using “extern” to access global variables and “#ifndef, #define, #endif” to oprate pre-compilation…

Here are my codes:

//vex.h
#ifndef _VEX_H_
#define _VEX_H_
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "v5.h"
#include "v5_vcs.h"
using namespace vex;
#endif

//bot.h
#ifndef _BOT_H_
#define _BOT_H_
#include "vex.h"
//declare my brain, controller,  motors, sensors, variables and some functions
#endif

//main.cpp
#include "vex.h"

void pre_auton( void ) {}
extern void autonomous( void );
extern void usercontrol( void );

int main() {
  Competition.autonomous( autonomous );
  Competition.drivercontrol( usercontrol );
  pre_auton();
    
  while(1) {
    vex::task::sleep(100);
  }
}

//usercontrol.cpp
#include "vex.h"
#include "bot.h"
void usercontrol( void ) {
  ...
}

//autonomous.cpp
#include "vex.h"
#include "bot.h"

void autonomous( void ) {
  if(auton == 1) {
  #include "auto1.h"
  }
  if(auton == 2) {
  #include "auto2.h"
  }
//.......
  if(auton == 8) {
  #include "auto8.h"
  }
}

But the Output seems like the program didnt pre-compiled…

Hope for a solution, my team and friends have struggled for serveral times…LOL

[jpearman]

header guards only stop an include file being used more than once within a specific source file

Include guard

see this thread that explains how to declare global instances for use by more than one source file.

Access globals from more than one source file (VEXcode)

I had promised here to do a quick explanation on how to access global variables from several c++ source files. The general idea is that global variables must be defined once only for the entire program. Any file that needs to access the same variable is told of it’s existence but does not declare it. In main.cpp I declare two globals, instances of the motor class, LeftMotor and RightMotor. main.cpp #include "vex.h" using namespace vex; // A global instance of vex::brain used for printi…

[hemm]

May it is too complex declaring all motors and my funtions in vex.h, is there any way simpler?

[hemm]

Maybe it is too complex declaring all motors and my funtions in vex.h, is there any way simpler?