How can I set a range for random number in c++ ?

Question

I want to set a range for random number . For ex :
rand() % (range)
Range means like 10 - 30
How can I do that ?

Answer 1

10 + rand() % (31-10)

Answer 2

And I like to make this into a function, so I can use whatever ranges I want:

int randAtoB(int a, int b) {
return (rand() % (b - a + 1)) + a;
}
//Now I can call it in main
int num = randAtoB(22, 101);

Answer 3

rand() % (31-10) = rand() % 21
It generates numbers from 0 to 20, by adding 10
10 + rand() % 21
it will generate number from 10 to 30

http://www.cplusplus.com/reference/cstdlib/rand/

Answer 4

It worked ...but can you please explain it to me ?😃😃

Answer 5

Ohh...thanks..I understood 😃😃

Answer 6

Hi I am new