How to get random numbers in a specific interval in c++

I need numbers in between the specific interval.

# include<iostream>
# include<cstdlib>
# include<ctime>
using namespace std;

int main()
{
    srand(time(0));

    for (int x = 1; x<=10; x++)
    {
        cout<<  15+ (rand()% 20)   <<endl;

    }
}

I expected the output between 15 and 20 like [15,20], but i always get output > or <, not in the exact interval.