tests/tests2/42_function_pointer.c

   1 #include <stdio.h>
   2
   3 int fred(int p)
   4 {
   5    printf("yo %d\n", p);
   6    return 42;
   7 }
   8
   9 int (*f)(int) = &fred;
  10
  11 /* To test what this is supposed to test the destination function
  12    (fprint here) must not be called directly anywhere in the test.  */
  13 int (*fprintfptr)(FILE *, const char *, ...) = &fprintf;
  14
  15 typedef int (*func) (int);
  16 static int dummy1(int i) { return 0; }
  17 int dummy2(int i) { return 0; }
  18 static func allfunc[] = { putchar, dummy1, dummy2 };
  19
  20 int main()
  21 {
  22    fprintfptr(stdout, "%d\n", (*f)(24));
  23
  24    printf ("%d\n", allfunc[0] == putchar);
  25    printf ("%d\n", allfunc[1] == dummy1);
  26    printf ("%d\n", allfunc[2] == dummy2);
  27    return 0;
  28 }
  29
  30 /* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/