C Structure (Keil Compiler)

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Code:

/* ---------------------------------------------------------------------- 
 * DECLARE your own open(), close(), addr(), and byte() routines here. 
 * 
 */ 

static int open1(), close1(), addr1(), byte1(); 
static int open2(), close2(), addr2(), byte2(); 
static int open3(), close3(), addr3(), byte3(); 
static int open4(), close4(), addr4(), byte4(); 

/* ---------------------------------------------------------------------- 
 * ADD an entry to this table to register your 
 * output format routines. Give your object format 
 * a name to be specified with the -F option. 
 * 
 */ 

static int format; 
static struct { 
   char *name; 
   int (*e_open)(); 
   int (*e_close)(); 
   int (*e_addr)(); 
   int (*e_byte)(); 
} formtab[] = { 
   { "tdr",   open1, close1, addr1, byte1 }, 
   { "byte",  open2, close2, addr2, byte2 }, 
   { "od",    open3, close3, addr3, byte3 }, 
   { "srec2", open4, close4, addr4, byte4 }, 
   { "srec3", open4, close4, addr4, byte4 }, 
   { "srec4", open4, close4, addr4, byte4 } 
}; 

#define FORMTABSIZE   (sizeof(formtab)/sizeof(formtab[0]))

Hi,

Above the structure declared the function in structure. This sample code is picked from other sample project code. This sample project i took from net is not completed source and some of the .h and .c file is not included.

The call functions:

Code:

(*formtab[format].e_open)(file,ftype,arg); 
(*formtab[format].e_close)(); 
(*formtab[format].e_addr)(a); 
(*formtab[format].e_byte)(b);

The compiler show:-> error C267: 'function': requires ANSI-style prototype

How to declare the function? I already included initial define function prototype. I think my function prototype is wrong.

The attached file is the code. Please help me...

Thank you.