1 #include <stdio.h> 2 3 extern int var; 4 extern void (*func_ptr)(void); 5 extern void print_var (void); 6 extern void print_foo (void); 7 extern int foo; 8 extern int var2[2]; 9 10 typedef struct 11 { 12 int * var; 13 void (* func_ptr)(void); 14 int * var_with_offset; 15 } 16 TEST; 17 18 TEST xyz = { & var, print_var, & var }; 19 20 const TEST const_xyz = { & var, print_var, & var }; 21 22 int 23 main (void) 24 { 25 print_var (); 26 27 printf ("We see var = %d\n", var); 28 printf ("Setting var = 456\n"); 29 30 var = 456; 31 32 print_var (); 33 printf ("We see var = %d\n\n", var); 34 35 var = 90; 36 print_var (); 37 printf ("We see var = %d\n\n", var); 38 39 print_foo (); 40 printf ("We see foo = %d\n", foo); 41 printf ("Setting foo = 19\n"); 42 foo = 19; 43 print_foo (); 44 printf ("We see foo = %d\n\n", foo); 45 fflush (stdout); 46 47 printf ("Calling dllimported function pointer\n"); 48 func_ptr (); 49 50 printf ("Calling functions using global structure\n"); 51 xyz.func_ptr (); 52 * xyz.var = 40; 53 xyz.func_ptr (); 54 55 printf ("We see var2[0] = %d\n\n", var2[0]); 56 57 printf ("We see const xyz %x %x\n", const_xyz.var, const_xyz.var_with_offset); 58 59 return 0; 60 } 61
