Thread: Help with some array stuff

Basically, 36000 rolls of the dice. I want to output the sum of the two dice (done) the frequency of each sum (done) and the expected along with actual. Both of the later should be in percentage. I know how they would be calculated. Actual is freq/36000 and expected is just stats stuff (1k, 2k, 3k, 4k, 5k, 6k, 5k, 4k, 3k, 2k, 1k).

When I try to do freq/36000 I just can't get it to work.

Any suggestions for getting both of these other needed values into arrays and printed?

Code:

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define SIZE 13

int rollDice(void);

int main ()
{
	int roll, sum, freq[SIZE] = {0};
	float expected[SIZE] = {0}, actual[SIZE] = {0};

	srand(time(NULL));

	for (roll= 1; roll <= 36000; roll++)
	{
		sum = rollDice();
		++freq[sum];
	}
	printf("%s%10s%12s%12s\n", "Sum", "Total", "Expected", "Actual");

	for (sum =2; sum <= SIZE -1; sum++)
	{
		printf("%2d%10d%12f%12f\n", sum, freq[sum], expected[sum], actual[sum]);
	}
	return 0;
}

int rollDice(void)
{
   int die1; 
   int die2;   
   int worksum; 

   die1 = 1 + ( rand() % 6 ); 
   die2 = 1 + ( rand() % 6 ); 
   worksum = die1 + die2;     
   
   return worksum; 
}