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#include <iostream>
#include <fstream>
using namespace std;
int get_students();
int add_movie_count(int[], const int, ofstream&);
double get_average(int[], const int);
int get_median(int[], const int);
int get_mode(int[], const int);
void bubble_sort(int[], const int);
int main(int argc, char * argv[])
{
if(!(argc > 1))
{
return 1;
}
ofstream outfile(argv[1], ios::out);
if(!(outfile.is_open()))
{
std::cout << "Error writing to file";
return 1;
}
outfile << "How many students were surveyed? ";
const int ARRAY_SIZE = get_students();
if (ARRAY_SIZE <= 1)
{
outfile << "Number of students surveyed must be greater than 1.\n";
return 1;
}
int *movies_per_student = new int[ARRAY_SIZE];
outfile << "Enter the number of movies each student saw." << endl;
int check = add_movie_count(movies_per_student, ARRAY_SIZE, outfile);
if (check == 99)
{
return 1;
}
bubble_sort(movies_per_student, ARRAY_SIZE);
double average = get_average(movies_per_student, ARRAY_SIZE);
//int median = get_median(movies_per_student, ARRAY_SIZE);
int mode = get_mode(movies_per_student, ARRAY_SIZE);
outfile << "The average number of movies seen is: " << average << endl;
//outfile << "The median of the number of movies seen is: " << median << endl;
outfile << "The mode of the number of movies seen is: " << mode << endl;
cout << "";
outfile.close();
delete [] movies_per_student;
return 0;
}
int get_students()
{
int students = 0;
cin >> students;
return students;
}
int add_movie_count(int array[],const int SIZE, ofstream& outfile)
{
int i = 1;
int movies = 0;
for(int j = 0; j < SIZE; j++)
{
cin >> movies;
outfile << "Student " << i << ": ";
if(movies < 0)
{
outfile << "Number of movies must be 0 or greater.\n";
return 99;
}
else if (movies >= 0)
{
array[j] = movies;
movies = 0;
}
i++;
}
return 0;
}
void bubble_sort(int array[], const int SIZE)
{
for (int i = 1; i < SIZE; i++)
{
for (int j = 0; j < SIZE - 1 - i; j++)
{
if (array[j] < array[j + 1])
{
int temp = array[j];
array[j] = array[j + 1];
array[j + 1] = temp;
}
}
}
}
double get_average(int array[], const int SIZE)
{
double average = 0;
for(int i = 0; i < SIZE; i++)
{
average = average + array[i];
}
average = average/SIZE;
return average;
}
int get_mode(int array[], const int SIZE)
{
int start = array[0];
int mode = start;
int count = 1;
int counter = 1;
for(int i = 1; i < SIZE; i++)
{
if(array[i] == start)
{
count++;
}
else
{
if(count > counter)
{
counter = count;
mode = start;
}
count = 1;
start = array[i];
}
}
return mode;
}
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