C++ code - 8 lines

Link:

C++, pasted on Jan 19:

#include <cstdio>

int main()
{ 
   double d = 123.456;
   printf("%a",d);
   return 0;
}

Output:

1
2
3

cc1plus: warnings being treated as errors
In function 'int main()':
Line 6: warning: ISO C++ does not support the '%a' printf format