Integers

All integer sizes are compiler-dependent.

Integers are int, which is short. In the Old Days, it would be
-32768..32767. Now an int is usually 32-bit.

If an int should be long, then declare it long int, or long for short.

If you want unsigned, then declare unsigned. Unsigned longs are unsigned long.

The postfix U is added for unsigned literals, and L for long literals.

#define INT8_MAX         127
#define INT16_MAX        32767
#define INT32_MAX        2147483647
#define INT64_MAX        9223372036854775807LL

#define UINT8_MAX        255
#define UINT16_MAX       65535
#define UINT32_MAX       4294967295U
#define UINT64_MAX       18446744073709551615ULL