C++, twenty numbers not random? [closed]

Answer 1

You need to use time() function as a seed in srand() and then use rand().

srand(time(NULL));

By the way you are not printing the rand() result, use this after the srand call:

for (int i= 0; i < 20; i++)
{
    int randomNumber = rand() % 100;
    cout << randomNumber << endl;
}