How can I pre declarate the 'menu' function? This code give this linker
(?) error:

::undefined symbol: (error)
::?_menu (main.obj) (error)

udv
Csaba

//menu definitions

typedef void voidfunc(char index);
typedef voidfunc *fad;

voidfunc menu;

typedef struct {
                  const char line[17]   ;
                  const char key        ;
                  fad        function   ;
                  const char param      ;
                }menuitem;

typedef struct {
                  const char itemno     ;
                  menuitem   *item      ;
                  char       lastitem   ;
                }menutype;

const menuitem main_menu[] =
                {//name                 key function param
                "temperature"           ,'1' ,menu,1,
                "relative humidity"     ,'2' ,menu,2,
                "light strength"        ,'3' ,menu,3,
                "device setting"        ,'4' ,menu,4
                };

#define N0 sizeof(main_menu)/sizeof(menuitem)

const menuitem menu1[] =
                {
                "calibration    "       ,'1',menu,11,
                "alarm max      "       ,'2',menu,12,
                "alarm min      "       ,'3',menu,13,
                "i/o setting    "       ,'4',menu,14
                };
#define N1 sizeof(menu1)/sizeof(menuitem)

void menu(char index){}

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