several C-Files

[kleyh@ba-loerrach.de]

Hy,

I like to write a program in LabWindows.

I’ve got two c-files. One with the main-function and the other with a subroutine.

When the user set the #define to 1 the program should work with the subroutine.

But it doesn’t.

I already read other posts concerning this subject but it didn’t help me.

Thanks for helping me.

The program doesn’t print: "The function ‘temperatur’ has been executed"

Here my program.

------------------------------
/* temp.h */

#include <ansi_c.h> 

void temperature();  --------------------------------
/* main.h */ #include <ansi_c.h>
#include <utility.h> #define TEMP 1 // the user set 1 or 0 --------------------------------
/* temp.c */ #include "temp.h" void temperature()
{
     printf("The function ‘temperatur’ has been executed");
}

--------------------------------

/* main.c */

#include "main.h"
#include "temp.h"

void main()

{
      if(TEMP)
    {                 
        void temperature();
        printf(“TEMP=1”);
    }
    else
    {
        printf(“TEMP=0”);
    }
}

[ISITEC_RIEPER]

Hy,

i'm not sure how c ansi reacts to if(1) or if (0), so how about

     if(TEMP == 1)
    {                 
        void temperature();
        printf(“TEMP=1”);
    }
    else
    {
        printf(“TEMP=0”);
    }

?

Greetings

Norbert

[jr_2005]

You have a 'void' too many. The one in red is confusing the compiler into thinking you are declaring another function prototype, rather than calling the previously defined function. Just delete it and it should work.

void main()
{
      if(TEMP)
    {                 
        void temperature();
        printf(“TEMP=1”);
    }
    else
    {
        printf(“TEMP=0”);
    }
}

JR

[kleyh@ba-loerrach.de]

Hy,

thank you for your answers.

I tried a version with 'if (TEMP == 1)' but it works the same way as before.
When I delete the 'void' before temperature in the main-function, the program returns an error: "missing prototype".

By including the temp.c instead of the temp.h I get the message: "Project link error: Multiply defined symbol '_temperature' in modules 'main.c' and 'temp.c'"

Any other ideas?

Thanks.

[jr_2005]

In both your temp.h and temp.c files, instead of void temperature() you could try void temperature(void) instead. I assume all these files are within your CVI project?

BTW, you should never #include a .c source file inside another one. Leads to all sorts of problems.

JR

[kleyh@ba-loerrach.de]

Hy,

thanks for your help.

Now it works.

Here the code for all others who have trouble including several c-files
-----------------------
/* main.h */

#include <ansi_c.h>
#include <utility.h>

#define TEMP 1 // the user set 1 or 0

-----------------------
/* temp.h */

#include <ansi_c.h>

void temperature(void); 

-----------------------
/* temp.c */

#include "temp.h"

void temperature ()
{
 printf("The function 'temperature' has been executed");
}

-----------------------
/* main.c */

#include "main.h"
#include "temp.h"

void main()

{
    if(TEMP)
    {
        temperature();
        printf("TEMP=1\n");
    }
    else
    {
        printf("TEMP=0\n");
    }
    Delay(10.0);
}