C++ random numbers

Question

At the following: http://www.fredosaurus.com/notes-cpp/misc/random.html

It mentions that if we want to generate a random number in the range 1-10, we ca

Answer 1

You add 1, because you want random number 1-10, not 0-9, what will % do without the +1.

For example, 10 % 10 == 0 and 9 % 10 == 9, so this gives you 0-9.
Adding +1 will "move" this interval to 1-10-> 10 % 10 + 1 == 1 and 9 % 10 + 1 == 10

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EDIT: Sorry, forgot about you srand question. rand() generates the same sequence of numbers, unless you call srand and "seed" the random number generator with different value, before calling rand(). So, here time(0) seeds the random number generator with the current time, that gives you different value for all the times, you call rand()