Modifying const variablesThis tip submitted by Wiro Sableng on 2006-01-30 01:43:11. It has been viewed 19742 times.Rating of 5.5 with 172 votes Warning: you almost never want to do this! But it is useful to know that it is possible--yes, a variable declared const can be modified in a variety of ways. Here is one of them, that demonstrates the power (and danger) of pointers. int main (void) { /* I assume long is 4 bytes */ const long num = 0xabcd1234; printf("%lx\n", num); /* change the first byte */ ((unsigned char *)&num)[0] = 0xaa; printf("%lx\n", num); return(0); } More tips Help your fellow programmers! Add a tip! |