Non-repeating random number generator

Question

I\'d like to make a number generator that does not repeat the number it has given out already (C++).

All I know is:

int randomgenerator(){
  int ran         


        

Answer 1

//non repeating random number generator
for (int derepeater = 0; derepeater < arraySize; derepeater++)
{
    for (int j = 0; j < arraySize; j++)
    {
        for (int i = arraySize; i > 0; i--)
        {
            if (Compare[j] == Compare[i] && j != i)
            {
                Compare[j] = rand() % upperlimit + 1;
            }
        }
    }
}