// Comment
#include <stdio.h>
int main (void)
{
int a = 0x89;
int b = 089;
int c = 89.;
int d = 'a';
int a = 0b0101U;
int c = 0b0101L;
int d = 0B0101L;
int b = 0b201u;
int b = 0B061u;
double hexadecimal_floating_constant = 0x1.2p3;
printf ("Hello %s!\n", "world");
return 0;
}