Question

Needs to be done in visual studio. I keep having problems with making my own function to call for the statistics and the random number generator. they are both supposed to be separate functions from the main. Can anyone help? Language is C
Overview: This third programming assignment will be the first to require the use of arrays. Like the second program, this program will be modular and make use of functions (including, this time, functions which process arrays). Brief Description: This program will simulate a user-specified number of rolls of a fair six-sided die and print out various statistical information about the rolls. Details: When your program first runs, it should print out print out your name, the course number ("CS102-03”), and the programming assignment name (“Programming Assignment #3”), each on a new line. Then, the program should skip a line (i.e., print a blank line), and print a brief description of what the program does. After the description, the program should ask the user how many die rolls to simulate. Your program should support from 1 to at least 100,000 simulated rolls. Once the user has entered the number of die rolls to simulate, your program should use repeated calls to C's rand() function (along with proper scaling and shifting) to simulate the proper number of rolls of a single six-sided die. After the rolls have been simulated, your program should print out some statistics about the rolls. This should include: 1. Total number of rolls simulated. 2. Number of times each number was rolled. 3. Percentage of the time each number was rolled, as a percentage of the total number of rolls. 4. Average value of rolls (i.e., sum of the value of all rolls divided by the total number of rolls). 5. Standard deviation of rolls (i.e., square root of average of squared differences from the mean).

Answer 1

SOURCE CODE IN C:

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include <time.h>

/*

Function to roll the die and store the results

@param rolls[] array to store the dice roll results

@param count number of rolls to simulate

*/

void rollDice(int rolls[], int count)

{

for(int i=0; i<count; i++)

rolls[i]=(rand()%6)+1;

}

/*

Function to calculate frequency of each roll, average roll and

standard deviation of the rolls and display them

@param rolls[] array to store the dice roll results

@param count number of rolls in the array

*/

void stats(int rolls[], int count)

{

int freq[]={0, 0, 0, 0, 0, 0};

int total=0;

for(int i=0; i<count; i++)

{

freq[rolls[i]-1]+=1;

total+=rolls[i];

}

double avg=(double)total/count, var=0;

for(int i=1; i<=6; i++)

{

var+=freq[i-1]*(i-avg)*(i-avg);

}

var/=count;

double std=sqrt(var);

printf("Results of %d rolls:\n", count);

for(int i=1; i<=6; i++)

printf("%d occurred %d times (%.4f%c).\n", i, freq[i-1], ((double)freq[i-1]/count)*100, '%');

printf("The average is %.6f.\n", avg);

printf("The standard deviation is %.6f.\n", std);

}

/*

Function to create the array of rolls and call the other

functions to fill the rolls and print stats

*/

int main()

{

srand(time(0));

printf("This program will simulate a user-specified number of rolls of a fair die and print out various statistical information about the rolls.\n\n");

int count, rolls[100000];;

printf("How many rolls do you want to simulate? ");

scanf("%d", &count);

while(count<1 || count>100000)

{

printf("Number of rolls should be between 1 and 100000.\nHow many rolls do you want to simulate? ");

scanf("%d", &count);

}

rollDice(rolls, count);

stats(rolls, count);

return 0;

}

OUTPUT:

This program will simulate a user-specified number of roll 9 of a fair die and print out various statistical informat ion about the rolls. How many rolls do you want to simulate? 100000 Results of 100000 rolls: 1 occurred 16608 times (16.6080%). 2 occurred 16483 times (16.48308). 3 occurred 16375 times (16.3750%). 4 occurred 16862 times (16.86208). 5 occurred 16883 times (16.8830%). 6 occurred 16789 times (16.7890%). The average is 3.512960. The standard deviation is 1.709085.