#include \"stdafx.h\" #include #include #include #include #include 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; // Function prototypes 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() { // Variables StudentData arr[SIZE]; int lowest1, lowest2, lowest3, lowest4; // Stores lowest exam scores int highest1, highest2, highest3, highest4; // Holds highest exam scores double average1 = 0, average2 = 0, average3 = 0, average4 = 0; // Represents average of each exam 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\"; // Call function to read data in file openInputFile(inFile, inFileName); // Read data into an array of structs 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; } // Close input file inFile.close(); // Get score total for each student getTotal(arr); // Determine grade for each student getGrade(arr); // Calculate lowest scores in each exam and total scores calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest); // Calculate highest scores in each exam and total scores calcHighest(arr, highest1, highest2, highest3, highest4, highest); // Calculate average of each exam and the average of the total scores getAverage(arr, SIZE, average1, average2, average3, average4, average); // Calculate standard deviation of each category getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation); cout << \"\ \"; // Print unsorted data print(arr, lowest, highest, average, standardDeviation); cout << \"\ \"; // Sort data sort(arr); // Print sorted data print(arr, lowest, highest, average, standardDeviation); system(\"PAUSE\"); return 0; } /** * Pre-condition: * Post-condition: */ void openInputFile(ifstream &inFile, string inFileName) { //Open the file inFile.open(inFileName); //Input validation if (!inFile) { cout << \"Error to open file.\" << endl; cout << endl; return; } } /** * Pre-condition: * Post-condition: */ void getTotal(StudentData arr[]) { for(int i = 0; i < SIZE; i++) { arr[i].total = arr[i].exam1 + arr[i].exam.

1. #include "stdafx.h"
#include
#include
#include
#include
#include
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;
// Function prototypes
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()
{
// Variables
StudentData arr[SIZE];

2. int lowest1, lowest2, lowest3, lowest4; // Stores lowest exam scores
int highest1, highest2, highest3, highest4; // Holds highest exam scores
double average1 = 0, average2 = 0, average3 = 0, average4 = 0; // Represents average of each
exam
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:UsersLisaDesktopscores.txt";
// Call function to read data in file
openInputFile(inFile, inFileName);
// Read data into an array of structs
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;
}
// Close input file
inFile.close();
// Get score total for each student
getTotal(arr);
// Determine grade for each student
getGrade(arr);
// Calculate lowest scores in each exam and total scores
calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest);
// Calculate highest scores in each exam and total scores
calcHighest(arr, highest1, highest2, highest3, highest4, highest);
// Calculate average of each exam and the average of the total scores
getAverage(arr, SIZE, average1, average2, average3, average4, average);
// Calculate standard deviation of each category
getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation);
cout << " ";
// Print unsorted data

3. print(arr, lowest, highest, average, standardDeviation);
cout << " ";
// Sort data
sort(arr);
// Print sorted data
print(arr, lowest, highest, average, standardDeviation);
system("PAUSE");
return 0;
}
/**
* Pre-condition:
* Post-condition:
*/
void openInputFile(ifstream &inFile, string inFileName)
{
//Open the file
inFile.open(inFileName);
//Input validation
if (!inFile)
{
cout << "Error to open file." << endl;
cout << endl;
return;
}
}
/**
* Pre-condition:
* Post-condition:
*/
void getTotal(StudentData arr[])
{
for(int i = 0; i < SIZE; i++)
{
arr[i].total = arr[i].exam1 + arr[i].exam2 + arr[i].exam3;
}
}

4. /**
* Pre-condition:
* Post-condition:
*/
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';
}
}
/**
* Pre-condition:
* Post-condition:
*/
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;
// Loop to determine lowest score from Exam1, 2, 3, and Total
for (int i = 0; i < SIZE; i++)
{
if (lowest1 > arr[i].exam1)

5. {
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;
}
}
// Loop lowest values into an array of size 4
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;
}
}
/**

6. * Pre-condition:
* Post-condition:
*/
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;
// Loop to determine highest score from Exam1, 2, 3, and 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;
}
}
// Loop highest values into an array of size 4

7. 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;
}
}
/**
* Pre-condition:
* Post-condition:
*/
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;
// Get sum of each category (Exam1, 2, 3, and Total)
for(int i = 0; i < SIZE; i++)
{
sum1 += arr[i].exam1;
sum2 += arr[i].exam2;
sum3 += arr[i].exam3;
sum4 += arr[i].total;
}
// Calculate average for each category
average1 += static_cast(sum1)/size;
average2 += static_cast(sum2)/size;
average3 += static_cast(sum3)/size;
average4 += static_cast(sum4)/size;
// Loop average values into an array of size 4

8. 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;
}
}
/**
* Pre-condition:
* Post-condition:
*/
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));
// Loop average values into an array of size
for(int index = 0; index < INFO; index++)

9. {
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 << " ";
}
/**
* Pre-condition:
* Post-condition:
*/
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;
}
}
}
}

10. Solution
#include "stdafx.h"
#include
#include
#include
#include
#include
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;
// Function prototypes
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()
{
// Variables

11. StudentData arr[SIZE];
int lowest1, lowest2, lowest3, lowest4; // Stores lowest exam scores
int highest1, highest2, highest3, highest4; // Holds highest exam scores
double average1 = 0, average2 = 0, average3 = 0, average4 = 0; // Represents average of each
exam
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:UsersLisaDesktopscores.txt";
// Call function to read data in file
openInputFile(inFile, inFileName);
// Read data into an array of structs
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;
}
// Close input file
inFile.close();
// Get score total for each student
getTotal(arr);
// Determine grade for each student
getGrade(arr);
// Calculate lowest scores in each exam and total scores
calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest);
// Calculate highest scores in each exam and total scores
calcHighest(arr, highest1, highest2, highest3, highest4, highest);
// Calculate average of each exam and the average of the total scores
getAverage(arr, SIZE, average1, average2, average3, average4, average);
// Calculate standard deviation of each category
getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation);
cout << " ";

12. // Print unsorted data
print(arr, lowest, highest, average, standardDeviation);
cout << " ";
// Sort data
sort(arr);
// Print sorted data
print(arr, lowest, highest, average, standardDeviation);
system("PAUSE");
return 0;
}
/**
* Pre-condition:
* Post-condition:
*/
void openInputFile(ifstream &inFile, string inFileName)
{
//Open the file
inFile.open(inFileName);
//Input validation
if (!inFile)
{
cout << "Error to open file." << endl;
cout << endl;
return;
}
}
/**
* Pre-condition:
* Post-condition:
*/
void getTotal(StudentData arr[])
{
for(int i = 0; i < SIZE; i++)
{
arr[i].total = arr[i].exam1 + arr[i].exam2 + arr[i].exam3;
}

13. }
/**
* Pre-condition:
* Post-condition:
*/
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';
}
}
/**
* Pre-condition:
* Post-condition:
*/
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;
// Loop to determine lowest score from Exam1, 2, 3, and Total
for (int i = 0; i < SIZE; i++)
{

14. 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;
}
}
// Loop lowest values into an array of size 4
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;
}
}

15. /**
* Pre-condition:
* Post-condition:
*/
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;
// Loop to determine highest score from Exam1, 2, 3, and 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;
}
}

16. // Loop highest values into an array of size 4
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;
}
}
/**
* Pre-condition:
* Post-condition:
*/
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;
// Get sum of each category (Exam1, 2, 3, and Total)
for(int i = 0; i < SIZE; i++)
{
sum1 += arr[i].exam1;
sum2 += arr[i].exam2;
sum3 += arr[i].exam3;
sum4 += arr[i].total;
}
// Calculate average for each category
average1 += static_cast(sum1)/size;
average2 += static_cast(sum2)/size;
average3 += static_cast(sum3)/size;
average4 += static_cast(sum4)/size;

17. // Loop average values into an array of size 4
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;
}
}
/**
* Pre-condition:
* Post-condition:
*/
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));
// Loop average values into an array of size

18. 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 << " ";
}
/**
* Pre-condition:
* Post-condition:
*/
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;
}
}
}
}