C Pitfalls and Defects Chapter 7 Portability Defects 7.8 Size of Random Numbers

The earliest C implementation, running on the PDP-11 computer, provided a function called rand, which produced a (pseudo)random non-negative integer.Integers are 16 bits long (including the sign bit) on PDP-11 computers, so the rand function will return an integer between 0 and 2^15-1.
A constant RAND_MAX is defined in the ANSI C standard, and its value is equal to the maximum value of random numbers.

Use the sizeof operator to measure the size in bytes of the constant, and then output its value.