如何实现一个数组来查看一个数字在我的代码中出现了多少次？

Question

I have an assignment that “pulls” a slot machine 10,000 times and gives my results of how much money I won/lost. How would I create an array to check the number of times I got a “loss” (0x), “free play” (1x), “double” (2x), “Mini jackpot” (100x), “Jackpot” (2000x your pay in)? I have tried everything I could to the best of my knowledge and just need some sort of direction on how to start. Here is the code I have for the slot machine:

public class slotAssignment {
public static void main (String [] args) {
SlotMachine johnnysOneArmBandit = new SlotMachine();
//Pulls the slot machine with one quarter 10k times
double winnings = 0.0;
for( int i = 0; i <10000; i++) {
    winnings = johnnysOneArmBandit.pull(1);
}
//"Pulls" the slot machine with two quarters 10k times
winnings = 0.0;
for(int i =0; i <10000; i ++) {
    winnings = johnnysOneArmBandit.pull(2);
}
System.out.println("Spending: $5,000 + Winning: " + winnings);
//"Pulls" the slot machine with three quarters 10k times
winnings = 0.0;
for(int i =0; i <10000; i ++) {
    winnings = johnnysOneArmBandit.pull(3);
    System.out.println("Spending: $7,500 + Winning: " + winnings);
    }
}

} win/loss types and values

Answer 1

First of all, I believe winnings = johnnysOneArmBandit.pull(#) should be winnings += johnnysOneArmBandit.pull(#). I don't know this for a fact because you didn't provide the method pull().

As for checking how many times you got each of those, you can check during each iteration of the loop what the result was. To store the number of times of each occurrence, the easiest way is probably an array of five doubles.

For example, if you want to check for a mini jackpot:

// For our purposes, 0 is loss, 1 is free play, 2 is double, 3 is mini jackpot, and 4 is jackpot
double[] count = {0,0,0,0,0};

for( int i = 0; i <10000; i++) {
    double x = johnnysOneArmBandit.pull(1);
    if(x == 0.25 * 100) {
         count[3]++;
    }
    // etc.
}