Question

Is it possible to print a random number in C++ from a set of numbers with ONE SINGLE statement?

Let’s say the set is {2, 5, 22, 55, 332}

I looked up rand() but I doubt it’s possible to do in a single statement.

Answer 1

Say these numbers are in a set of size 5, all you gotta do is find a random value multiplied by 5 (to make it equi probable). Assume the rand() method returns you a random value between range 0 to 1. Multiply the same by 5 and cast it to integer you will get equiprobable values between 0 and 4. Use that to fetch from the index.

I dont know the syntax in C++. But this is how it should look

my_rand_val = my_set[(int)(rand()*arr_size)]

Here I assume rand() is a method that returns a value between 0 and 1.