Generate a random number depending on input in a defined interval

I want to generate random numbers that deppend on input from user.

For example if user inputs 8, I want to generate number from 5 to 7, (8 - 3) to (8 - 1)

My code:

#include <iostream>
#include <time.h>

int main()
{

    int x1;
    int x2;

    std::srand(time(0));

    while (true)
    {
        std::cout << "input : ";
        std::cin >> x1;

        x2 = std::rand() % (x1 - 1) + (x1 - 3);

        std::cout << "result : " std::cout << x2 << std::endl;
    }
    return 0;
}

But the output is:

input : 8
result : 7
input : 8
result : 10
input : 8
result : 8

And I want result to be from 5 to 7.