用Java将随机生成的数字加在一起

Question

I have a problem I'm trying to work on.

I have this code so far.

public class Average {
        public static void main(String[] args){
            int n= Integer.parseInt(args[0]);
            int i;
            for(i=1; i<= n; i++){
                System.out.println(Math.random());              
            }
        }
    }

This gives me n randomly generated numbers, Yay! But I want to be able to add those numbers together. Can this be done? I'm completely lost.

Answer 1

public class Average {
    public static void main(String[] args){
        int n= Integer.parseInt(args[0]);
        int i;
        double thisRand = 0;
        double result = 1;
        for(i=1; i<= n; i++){
            thisRand = Math.random();
            System.out.println(thisRand);
            result *= thisRand;
        }
    }
}

The variable result will contain the multiplication of your random values. The *= operator multiplies the the values on either side of it, and stores it in the left-hand side variable.

Answer 2

Here is the solution, you will give two arguments, "number" that is the amount of numbers you want to multiply, and the "result" of multiplying all numbers, hope is what you want. I use recursive programming

   public static void main(String[] args) {
      Integer result=1;
      System.out.println(multiplyNumbers(3, result));
   }
   static Integer multiplyNumbers(int number, int result){
        int value = new Random().nextInt(10);
        if (number > 0){
            result = multiplyNumbers(--number, result);
            return result *= value;
        }
        return 1;
    }