in C++, thanks.

Your completed program should simulate rolls of several pairs of dice and store them in a data

file, and then it should read from the data file to produce a histogram file with a simple text representation of a histogram. The simulation is already done for you; your task is to produce a histogram, formatted as on the reverse sheet. You are encouraged to use the helper functions in the starter file as guidance, but you dont have to as long as you produce a correct histogram.

Some useful code:

// Starter file

#include

#include

#include

#include

using namespace std;

const int N_ROLLS = 200; // how many rolls to simulate

const string DATA_FILENAME = "data.txt";

const string HIST_FILENAME = "hist.txt";

int getRoll() {return (rand()%6+rand()%6+2);}

// returns the value (between 2 and 12) of a toss of a pair of random dice

void simulateAndRecord();

// Pre: No meaningful data is in either file

// Post: Results of simulation of N_ROLLS pairs of dice are in DATA_FILENAME

void produceHistogram();

// Pre: DATA_FILE contains (at most) N_ROLLS values 2-12;

// HIST_DATA has no meaningful info; both files are closed

// Post: For each val 2-12, HIST_FILE contains a line of stars

// counting the # times that val appears in DATA_FILE

void writeLineOfStars(int rolls[], int nRolls, int val, ostream& out);

// Pre: rolls array contains nRolls simulations; out is an opened output file

// Post: The val line of the histogram has been appended to out, e.g., if val=3

// and 3 occured 5 times, the line would be "3: *****"

int main() {

simulateAndRecord();

produceHistogram();

return 0;

}

// simulate rolling N_ROLLS pairs of dice; record values in DATA_FILENAME

void simulateAndRecord() {

ofstream datafile(DATA_FILENAME); // open DATA_FILENAME

for (int i=0; i

datafile << getRoll() << endl; // simulate 1 roll and output it to datafile

}

datafile.close(); // close the file

}

void produceHistogram() {

/* TODO: implement this function; define writeLineOfStars helper */

}