How to generate a random number in C++?

The random number is generated by using an algorithm that gives a series of non-related numbers whenever this function is called. The rand () function is used in C++ to generate random numbers in the range [0, RAND_MAX). RAND_MAX: It is a constant whose default value may vary between implementations but it is granted to be at least 32767.

How do I get a number within a range using RAND?

rand () will return numbers between 0 and RAND_MAX, which is at least 32767. If you want to get a number within a range, you can just use modulo. For more accuracy, check out this article. It discusses why modulo is not necessarily good (bad distributions, particularly on the high end), and provides various options.

What is RAND_MAX in C?

(Note, by the way, that RAND_MAX is a constant telling you what the fixed range of the C library rand function is. You cannot set RAND_MAX to some other value, and there is no way of requesting that rand return numbers in some other range.)

How do you initialize a random distribution object?

Next, the distribution object is initialized with arguments of min/max values for an interval, from where the random numbers are generated. In the following example, we use uniform_int_distribution and output 10 integers to console arbitrarily. header provides multiple random engines with different algorithms and efficiency trade-offs.