c++ random numbers, evenly distributed

I need to generate random numbers between two values in c++, which can be generated like that(in a range 1 to 6) :

#include <iostream>
#include <random>

int main(int argc, char* argv[]){
 srand(time(NULL));

for (int j = 0; j < 6 ; j++) {
    randomNumber = rand() % 6 + 1;
    cout << randomNumber;

return 0;
}

But I also need to ensure that it generates at least once each number in the range, for example: range [1,6], you must generate at least once the 1,2,3,4,5 and 6.

And there is another thing, the numbers generated, must be evenly distributed, like if want generate 20 iterations in range of[1,6], each number(1,2,3,4,5,6) should have approximately the same quantity generated at 20 iterations. Example: 1,3,5,2,4,6,2,4,6,1,3,5,6,5,4,3,5,2,1.... and not like this: 1,3,5,6,6,6,2,6,4,4,4,4,4,4...

If anyone knows how to solve this, I'll be very grateful to you. Thanks!!!