Question

Having a bit of trouble in my c++ class, was wondering if anyone can help.
Write a program to calculate students' average test scores and their grades. You may assume the following input data:


Johnson 85 83 77 91 76
Aniston 80 90 95 93 48
Cooper 78 81 11 90 73
Gupta 92 83 30 68 87
Blair 23 45 96 38 59
Clark 60 85 45 39 67
Kennedy 77 31 52 74 83
Bronson 93 94 89 77 97
Sunny 79 85 28 93 82
Smith 85 72 49 75 63

Use three arrays: a one-dimensional array to store the students names, a (parallel) two-dimensional array to store the test scores, and a parallel one-dimensional arayto store grades. Your program must contain at least the following functions: a function to read and store data into two arrays, a function to calculate the averagetest score and grade, and a function to output the results. Have your program also output the class average.

Thanks for any help.

Answer 1

    

#include <iostream>

#include <fstream>

#include <string>

#include <iomanip>

using namespace std;

void getData(ifstream& inf, string n[], double tstData[][6], int count);

void calculateAverage(double tstData[][6], int count);

void calculateGrade(double tstData[][6], char gr[], int count);

void print(string n[], double tstData[][6], char gr[], int count);

  

int main()

{

string names[10];

    double testData[10][6];

    char grade[10];

    ifstream inFile;

    inFile.open("ch8_Ex13Data.txt");

    if (!inFile)

    {

        cout << "Cannot open the input file: ch8_Ex13Data.txt." << endl;

        cout << "Program terminates!" << endl;

        return 1;

    }

    cout << fixed << showpoint << setprecision(2);

    getData(inFile, names, testData, 10);

    calculateAverage(testData, 10);

    calculateGrade(testData, grade, 10);

    print(names, testData, grade, 10);

    inFile.close();

return 0;

}

void getData(ifstream& inf, string n[], double tstData[][6], int count)

{

    for (int i = 0; i < count; i++)

    {

        inf >> n[i];

        

        for (int j = 0; j < 5; j++)

            inf >> tstData[i][j];

        tstData[i][5] = 0.0;

    }

}

void calculateAverage(double tstData[][6], int count)

{ 

    double sum;

    for (int i = 0; i < count; i++)

    {

        sum = 0.0;

        for (int j = 0; j < 5; j++)

            sum = sum + tstData[i][j];

        tstData[i][5] = sum / 5;

    }

}

void calculateGrade(double tstData[][6], char gr[], int count)

{

    for (int i = 0; i < count; i++)

        if (tstData[i][5] >= 90)

            gr[i] = 'A';

        else if (tstData[i][5] >= 80)

            gr[i] = 'B';

        else if (tstData[i][5] >= 70)

            gr[i] = 'C';

        else if (tstData[i][5] >= 60)

            gr[i] = 'D';

        else 

            gr[i] = 'F';

}

void print(string n[], double tstData[][6], char gr[], int count)

{

    double sum = 0.0;

    cout << left << setw(10) << "Name"

         << right << setw(8) << "Test 1"

         << setw(8) << "Test 2"

         << setw(8) << "Test 3"

         << setw(8) << "Test 4"

         << setw(8) << "Test 5"

         << setw(10) << "Average"

         << setw(8) << "Grade" << endl;

    for (int i = 0; i < count; i++)

    {

        cout << left << setw(10) << n[i];

        cout << right;

        for (int j = 0; j < 5; j++)

            cout << setw(8) << tstData[i][j];

        cout << setw(10) << tstData[i][5]

             << setw(6) << gr[i] << endl;

        sum = sum + tstData[i][5];

    }

    cout << endl << endl;

    cout << "Class average: " << sum / count << endl;

}