HOWTO: Declare an Array of Pointers to Functions

• Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, 6.0ax
• Microsoft C/C++ for MS-DOS, version 7.0
• Microsoft Visual C++ for Windows, versions 1.0, 1.5
• Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 4.0, 4.1, 5.0

SUMMARY

The sample below demonstrates building an array that contains function addresses and calling those functions.

Sample Code

   /*
    * Compile options needed: none
    */

   #include <stdio.h>

   void test1();
   void test2();            /*  Prototypes */
   void test3();

   /* array with three functions */
   void (*functptr[])() = { test1, test2, test3 } ;

   void main()
   {
      (*functptr[0])();    /*  Call first function  */
      (*functptr[1])();    /*  Call second function */
      (*functptr[2])();    /*  Call third function  */
   }

   void test1()
   {
      printf("hello 0\n");
   }

   void test2()
   {
      printf("hello 1\n");
   }

   void test3()
   {
      printf("hello 2\n");
   }

Keywords          : CLngIss kbfasttip
Version           : MS-DOS:5.1,6.0,6.00a,6.00ax,7.0; WINDOWS:1.0,1.5; WINDOWS  NT:1.0,2.0,4.0,4.1,5.0
Platform          : MS-DOS NT WINDOWS
Issue type        : kbinfo