sizeof (char) = 1
sizeof (signed char) = 1
sizeof (unsigned char) = 1
sizeof (short) = 2
sizeof (signed short) = 2
sizeof (unsigned short) = 2
sizeof (int) = 4
sizeof (signed int) = 4
sizeof (unsigned int) = 4
sizeof (long long) = 8
sizeof (signed long long) = 8
sizeof (unsigned long long) = 8
sizeof (float) = 4
sizeof (double) = 8