#include
int main(void)
{
int i = -1;
signed char sc = 0xff;
unsigned char usc = 0xff;
printf (“Comparing %x with %x\n”, i, sc);
if (i == sc) puts(“i == sc”);
else puts(“i != sc”);
putchar (‘\n’);
printf (“Comparing %x with %x\n”, i, usc);
if (i == usc) puts(“i == usc”);
else puts(“i != usc”);
return 0;
}