memdump的C语言实现

#include 
#include 
#include 

static const char * const hex_digit = "0123456789ABCDEF";

static char quickhex (int i)
{
	return hex_digit[i];
}

static void memdump (void *pv, size_t num)
{
	int i;
	unsigned char *pc = (unsigned char *) pv;

	for (i = 0; i < num; i++)
		printf ("%c%c ", quickhex (pc[i] >> 4), quickhex (pc[i] & 0x0f));
	printf ("t");
	for (i = 0; i < num; i++)
		printf ("%c", isprint (pc[i]) ? pc[i] : '.');
	printf ("n");
}


int main()
{
    char *str = "A~";
    memdump( str, strlen(str) );
    return 0;
}