#include <conio.h>

#define show_var(var) (show_mem(&var, sizeof(var)))
show_mem(void *addr, unsigned len);

typedef struct {char c; int i; long l; float f; double d; long double ld;} mystruct ;

main(void)
{
   char c         = 'A';
   int i          = 84326123;
   long l         = 0xFFFFFFFF;
   float f        = 31241.215;
   double d       = 231854.56463526;
   long double ld = 1.224e-155;
   mystruct ms    = {c, i, l, f, d, ld}; 

   #define tracevar(var) { printf("%2s: ", #var); show_var(var); }
   tracevar(c);
   tracevar(i);
   tracevar(l);
   tracevar(f);
   tracevar(d);
   tracevar(ld);
   putch('\n');
   tracevar(ms);
   
   getch();
}

show_mem(void *addr, unsigned len)
{
   printf("(%02d) ", len);
   while(len--) printf("%02X ", *(((unsigned char*)addr)++));
   putch('\n');
}