Question

Create 4 arrays: a 1-D array to store the students’ id, 1-D array to store the students’ names, a parallel 2-D array to store the test scores, and a parallel 1-D array to store letter grades.
Read data into the 3 arrays from the file data121.txt. If the file is not found, the program needs to terminate with this error, “Data file not found.”
           Calculate and store a letter grade into a 1-D array based on the total score, sum up all scores for each student, for example if the total score is 82, then the grade is a B.
Score   Letter grade
90 ~ 100 A
80 ~ 89   B
70 ~ 79   C
60 ~ 70   D
0 ~ 60   F
Once the data has been read into the arrays, implement the following 3 steps.
Display all students’ names, scores, and their grades,
Calculate and display a student name that received overall maximum points,
Calculate and display the average of all elements in the array test scores,
Generate a new text file report121.txt and save students’ names and grades.

data.121.txt;(id numbers on the left)

3450, Guido VanRossum, 10, 15, 14, 18, 20
6120, Yukihiro Matsumoto, 10, 9, 13, 12, 14
9230, James Gosling, 10, 16, 13, 12, 10
2340, Dennis Ritchie, 11, 15, 14, 18, 11
3180, Kathleen Booth, 9, 11, 14, 18, 12
7800, Bjarne Stroustrup, 18, 20, 20, 19, 20
5410, Rasmus Lerdorf, 10, 12, 14, 18, 20
1590, Larry Wall, 12, 15, 14, 16, 8
2170, Brendan Eich, 20, 15, 14, 18, 20
6530, Ada Lovelace, 10, 5, 14, 8, 10

Using C++ language

Answer 1

Note: Could you plz go this code and let me know if u need any changes in this.Thank You
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data121.txt

3450, Guido VanRossum, 10, 15, 14, 18, 20
6120, Yukihiro Matsumoto, 10, 9, 13, 12, 14
9230, James Gosling, 10, 16, 13, 12, 10
2340, Dennis Ritchie, 11, 15, 14, 18, 11
3180, Kathleen Booth, 9, 11, 14, 18, 12
7800, Bjarne Stroustrup, 18, 20, 20, 19, 20
5410, Rasmus Lerdorf, 10, 12, 14, 18, 20
1590, Larry Wall, 12, 15, 14, 16, 8
2170, Brendan Eich, 20, 15, 14, 18, 20
6530, Ada Lovelace, 10, 5, 14, 8, 10

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#include <fstream>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <stdlib.h> /* atof */
#include <fstream>
using namespace std;

//Function Declarations
void calLetterGrade(int** scores, char letterGrades[], int count);
void display(int id[], string names[], int** scores, char letterGrades[], int count);
void displayMaxScores(string names[], int** scores, int count);
void displayOverallAverage(int** scores, int count);
void writeToFile(string names[], char letterGrades[], int count);
int main()
{

// Getting the input entered by the user
int count = 0, i = 0;
string name;
double val;

// setting the precision to two decimal places
std::cout << std::setprecision(2) << std::fixed;

// defines an input stream for the data file
ifstream dataIn;

// Opening the input file
dataIn.open("data121.txt");
// checking whether the file name is valid or not
if (dataIn.fail()) {
cout << "** File Not Found **";
return 1;
}
else {
// reading the data from the file
while (getline(dataIn, name)) {
count++;
}
dataIn.close();

// Creating array dynamically
int* id = new int[count];
string* names = new string[count];
// Creating 2-D array Dynamically
int** scores = new int*[count];
for (int i = 0; i < count; ++i)
scores[i] = new int[5];
char letterGrades[count];

// Opening the input file
dataIn.open("data121.txt");
char ch;
string token;
// reading the data from the file and populating into arrays
for (int i = 0; i < count; i++) {
getline(dataIn, name);

stringstream ss(name);

while (getline(ss, token, ',')) {

//cout<<token<<endl;
id[i] = atoi(token.c_str());
getline(ss, token, ',');
//cout<<token<<endl;

names[i] = token;
for (int j = 0; j < 5; j++) {
getline(ss, token, ',');
//cout<<token<<endl;
scores[i][j] = atoi(token.c_str());
}
}
}

dataIn.close();

//calling the functions
calLetterGrade(scores, letterGrades, count);
display(id, names, scores, letterGrades, count);
displayMaxScores(names, scores, count);
displayOverallAverage(scores, count);
writeToFile(names, letterGrades, count);
}

return 0;
}

//This function will calculate the letter grade
void calLetterGrade(int** scores, char letterGrades[], int count)
{
double average, sum = 0;
char gradeLetter;
for (int i = 0; i < count; i++) {
sum = 0;
for (int j = 0; j < 5; j++) {
sum += scores[i][j];
}
average = (sum / 5) * 5;

if (average >= 90)
gradeLetter = 'A';
else if (average >= 80 && average < 90)
gradeLetter = 'B';
else if (average >= 70 && average < 80)
gradeLetter = 'C';
else if (average >= 60 && average < 70)
gradeLetter = 'D';
else if (average < 60)
gradeLetter = 'E';

letterGrades[i] = gradeLetter;
}
}
//This function will display the names,scores,letter grades
void display(int id[], string names[], int** scores, char letterGrades[], int count)
{
for (int i = 0; i < count; i++) {
cout << id[i] << setw(20) << left << names[i] << setw(10) << right;
for (int j = 0; j < 5; j++) {
cout << scores[i][j] << " ";
}
cout << letterGrades[i] << endl;
}
}
//Thus function will calculate and display the over all average of all scores
void displayOverallAverage(int** scores, int count)
{
double sum = 0, avg;
for (int i = 0; i < count; i++) {
for (int j = 0; j < 5; j++) {
sum += scores[i][j];
}
}
avg = sum / (count * 5);
cout << " Overall Average :" << avg << endl;
}

void displayMaxScores(string names[], int** scores, int count)
{
int max;
cout << " Displaying Names and Maximum Scores:" << endl;
cout << "Name Maximum Score" << endl;
cout << "---- -------------" << endl;

for (int i = 0; i < count; i++) {
max = scores[0][0];
for (int j = 0; j < 5; j++) {
if (max < scores[i][j])
max = scores[i][j];
}
cout << setw(20) << left << names[i] << setw(5) << right << max << endl;
}
}
//This function will write the names and grades to the out file
void writeToFile(string names[], char letterGrades[], int count)
{
//Defines an output stream for the data file
ofstream dataOut;
//creating and Opening the output file
dataOut.open("report121.txt");
dataOut << "Name Grade Letter" << endl;
dataOut << "---- ------------" << endl;

for (int i = 0; i < count; i++) {
dataOut << setw(20) << left << names[i] << setw(5) << right << letterGrades[i] << endl;
}
dataOut.close();
}

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Output:(Console)

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Output file (report121.txt):

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