How to print out the memory contents of a variable in C?

Question

Suppose I do a

double d = 234.5;

I want to see the memory contents of d [the whole 8 bytes]

How do I do that?

Answer 1

unsigned char *p = (unsigned char *)&d;
int i;

for (i = 0; i < sizeof d; i++)
    printf("%02x ", p[i]);