Weighted random numbers

Question

I\'m trying to implement a weighted random numbers. I\'m currently just banging my head against the wall and cannot figure this out.

In my project (Hold\'em hand-ran

Answer 1

What I do when I need to weight numbers is using a random number for the weight.

For example: I need that generate random numbers from 1 to 3 with the following weights:

• 10% of a random number could be 1
• 30% of a random number could be 2
• 60% of a random number could be 3

Then I use:

weight = rand() % 10;

switch( weight ) {

    case 0:
        randomNumber = 1;
        break;
    case 1:
    case 2:
    case 3:
        randomNumber = 2;
        break;
    case 4:
    case 5:
    case 6:
    case 7:
    case 8:
    case 9:
        randomNumber = 3;
        break;
}

With this, randomly it has 10% of the probabilities to be 1, 30% to be 2 and 60% to be 3.

You can play with it as your needs.

Hope I could help you, Good Luck!