C++ programming. Please provide the code and use comments throughout code!! Make

Question

C++ programming. Please provide the code and use comments throughout code!! Make sure the output is the same as the one shown below. Neat coding.

Programming Assignment #3: Student CS Grade Database Description: This program will read a data file that will contain students' scores for 5 Computer Science (CS) tests. Each student record will contain his her last name, first name, numeric student ID, student username, 5 test scores, average for these five scores, and grade for CS course. The file will be processed by the program and will produce a report The report contains seven parts 1) The students' usernames 2) The average score for each student's five tests 3) The grade for each student's CS course. 4) The average CS scores for the class. 5) The total number of students with grades A. B. C. D. and F 6) The sorted student names and IDs based on user choice: descending or ascending order of grades. 7 Search a student grade by entering student user name ID (See the attached sample input and output for example.)

Explanation / Answer

#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <cmath>

using namespace std;

struct StudentData
{
int studentID;
string first_name;
string last_name;
int exam1;
int exam2;
int exam3;
int total;
char ch;
};

const int SIZE = 9;
const int INFO = 4;
void openInputFile(ifstream &, string);
void getTotal(StudentData[]);
void getGrade(StudentData[]);
void calcLowest(StudentData[], int &, int &, int &, int &, int[]);
void calcHighest(StudentData[], int &, int &, int &, int &, int[]);
void getAverage(StudentData[], int, double &, double &, double &, double &, double[]);
void getStd(StudentData[], double &, double &, double &, double &, double &, double &, double &, double &, double[]);
void print(StudentData[], int[], int[], double[], double[]);
void sort(StudentData[]);

int main()
{
StudentData arr[SIZE];
int lowest1, lowest2, lowest3, lowest4;
int highest1, highest2, highest3, highest4;
double average1 = 0, average2 = 0, average3 = 0, average4 = 0;
double std1 = 0, std2 = 0, std3 = 0, std4 = 0; // Holds standard deviation for Exams 1-3 and Total
int lowest[INFO] = {};
int highest[INFO] = {};
double average[INFO] = {};
double standardDeviation[INFO] = {};

ifstream inFile;
string inFileName = "C:\Users\Lisa\Desktop\scores.txt";
openInputFile(inFile, inFileName);

for(int count = 0; count < SIZE; count++)
{
inFile >> arr[count].studentID >> arr[count].first_name >> arr[count].last_name >> arr[count].exam1 >> arr[count].exam2 >> arr[count].exam3;
}
inFile.close();
getTotal(arr);
getGrade(arr);
calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest);   
calcHighest(arr, highest1, highest2, highest3, highest4, highest);
getAverage(arr, SIZE, average1, average2, average3, average4, average);
getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation);
cout << " ";
print(arr, lowest, highest, average, standardDeviation);
  
cout << " ";
sort(arr);
print(arr, lowest, highest, average, standardDeviation);

system("PAUSE");

return 0;
}

void openInputFile(ifstream &inFile, string inFileName)
{
inFile.open(inFileName);
if (!inFile)
{
cout << "Error to open file." << endl;
cout << endl;
return;
}
}
void getTotal(StudentData arr[])
{
for(int i = 0; i < SIZE; i++)
{
arr[i].total = arr[i].exam1 + arr[i].exam2 + arr[i].exam3;
}
}
void getGrade(StudentData arr[])
{
for(int i = 0; i < SIZE; i++)
{
if(arr[i].total >= 270)
arr[i].ch = 'A';
else if(arr[i].total >= 240)
arr[i].ch = 'B';
else if(arr[i].total >= 210)
arr[i].ch = 'C';
else if(arr[i].total >= 180)
arr[i].ch = 'D';
else
arr[i].ch = 'F';
}
}
void calcLowest(StudentData arr[], int &lowest1, int &lowest2, int &lowest3, int &lowest4, int lowest[])
{
int smallest = 0;

lowest1 = arr[0].exam1;
lowest2 = arr[0].exam2;
lowest3 = arr[0].exam3;
lowest4 = arr[0].total;
for (int i = 0; i < SIZE; i++)
{
if (lowest1 > arr[i].exam1)
{
lowest1 = arr[i].exam1;
smallest = i;
}

if (lowest2 > arr[i].exam2)
{
lowest2 = arr[i].exam2;
smallest = i;
}

if (lowest3 > arr[i].exam3)
{
lowest3 = arr[i].exam3;
smallest = i;
}

if (lowest4 > arr[i].total)
{
lowest4 = arr[i].total;
smallest = i;
}
}
for(int index = 0; index < INFO; index++)
{
if(index == 0)
lowest[0] = lowest1;
else if(index == 1)
lowest[1] = lowest2;
else if(index == 2)
lowest[2] = lowest3;
else if(index == 3)
lowest[3] = lowest4;
else
cout << "Fail!" << endl;
}
}
void calcHighest(StudentData arr[], int &highest1, int &highest2, int &highest3, int &highest4, int highest[])
{
int biggest = 0;

highest1 = arr[0].exam1;
highest2 = arr[0].exam2;
highest3 = arr[0].exam3;
highest4 = arr[0].total;
for (int i = 0; i < SIZE; i++)
{
if (highest1 < arr[i].exam1)
{
highest1 = arr[i].exam1;
biggest = i;
}

if (highest2 < arr[i].exam2)
{
highest2 = arr[i].exam2;
biggest = i;
}

if (highest3 < arr[i].exam3)
{
highest3 = arr[i].exam3;
biggest = i;
}

if (highest4 < arr[i].total)
{
highest4 = arr[i].total;
biggest = i;
}
}

for(int index = 0; index < INFO; index++)
{
if(index == 0)
highest[0] = highest1;
else if(index == 1)
highest[1] = highest2;
else if(index == 2)
highest[2] = highest3;
else if(index == 3)
highest[3] = highest4;
else
cout << "Fail!" << endl;
}
}

void getAverage(StudentData arr[], int size, double &average1, double &average2, double &average3, double &average4, double average[])
{
int sum1 = 0, sum2 = 0, sum3 = 0, sum4 = 0;

for(int i = 0; i < SIZE; i++)
{
sum1 += arr[i].exam1;
sum2 += arr[i].exam2;
sum3 += arr[i].exam3;
sum4 += arr[i].total;
}

average1 += static_cast<double>(sum1)/size;

average2 += static_cast<double>(sum2)/size;

average3 += static_cast<double>(sum3)/size;

average4 += static_cast<double>(sum4)/size;

for(int index = 0; index < INFO; index++)
{
if(index == 0)
average[0] = average1;
else if(index == 1)
average[1] = average2;
else if(index == 2)
average[2] = average3;
else if(index == 3)
average[3] = average4;
else
cout << "Fail!" << endl;
}
}

void getStd(StudentData arr[], double &std1, double &std2, double &std3, double &std4, double &average1, double &average2, double &average3, double &average4, double standardDeviation[])
{
double deviationSum1 = 0, deviationSum2 = 0, deviationSum3 = 0, deviationSum4 = 0;

for(int i = 0; i < SIZE; i++)
{
deviationSum1 += pow((arr[i].exam1 - average1), 2);
deviationSum2 += pow((arr[i].exam2 - average2), 2);
deviationSum3 += pow((arr[i].exam3 - average3), 2);
deviationSum4 += pow((arr[i].total - average4), 2);
}

std1 = sqrt(deviationSum1 / ((SIZE) - 1));
std2 = sqrt(deviationSum2 / ((SIZE) - 1));
std3 = sqrt(deviationSum3 / ((SIZE) - 1));
std4 = sqrt(deviationSum4 / ((SIZE) - 1));
for(int index = 0; index < INFO; index++)
{
if(index == 0)
standardDeviation[0] = std1;
else if(index == 1)
standardDeviation[1] = std2;
else if(index == 2)
standardDeviation[2] = std3;
else if(index == 3)
standardDeviation[3] = std4;
else
cout << "Fail!" << endl;
}
}

cout << " ";
}

void sort(StudentData arr[])
{
StudentData temp;

for (int i = 0; i < (SIZE - 1); i++)
{
for (int j = i + 1; j < SIZE; j++)
{
if (arr[i].last_name > arr[j].last_name)
{
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
}

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