Thread: volatile??

Code:

unsigned const volatile data;

You can't change the value of 'data', but volatile indicates that something else may change its value.

Code:

unsigned volatile data;

You can change the value of 'data', and volatile indicates that something else may change its value too.

Code:

#include <stdio.h>
int main(void)
{
   unsigned const volatile a = 1; /* initialization, ok */
   unsigned       volatile b = 1; /* initialization, ok */
   a = 4; /* assignment, error - 'cannot modify a const object' */
   b = 5; /* assignment, ok */
   while(a && b)
   {
      printf("a = %u, b = %u\n", a, b);
   }
   return 0;
}