Question

Write a program that reads students’ names followed by their test scores. The program should output each student’s name followed by the test scores and the relevant grade. It should also find and print the highest test score and the name of the students having the highest test score. Student data should be stored in a struct variable of type studentType, which has four components: studentFName and studentLName of type string, testScore of type int (testScore is between 0 and 100), and grade of type char. Suppose that the class has 20 students. Use an array of 20 components of type studentType. Your program must contain at least the following functions:

1. A function to read the students’ data into the array.
2. A function to assign the relevant grade to each student.
3. A function to find the highest test score.
4. A function to print the names of the students having the highest test score.

Your program must output each student’s name in this form: last name followed by a comma, followed by a space, followed by the first name; the name must be left justified. Moreover, other than declaring the variables and opening the input and output files, the function main should only be a collection of function calls.

This should be written in C++ please thank you.

Data must be read from a file

Answer 1

Code is provided as text at last

Sample "Student.dat" file-

Program-

Output-

Code-

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <cstdlib>
#include <sstream>

using namespace std;

//Define structure studentType

struct studentType

{

   //Declaring variables

   string studentFirstName;
   string studentMiddleName;
   string studentLastName;
   double testScore;
   char grade;

};

//Functions required

void getData(ifstream& inFile, studentType sList[], int listSize);
void calculateGrade(studentType sList[], int listSize);
int highestScore(const studentType sList[], int listSize);
void printResult(const studentType sList[], int listSize);

//Define main function

int main()

{

   //Defining in variable

   ifstream in;

   //Open student file

   in.open("student.dat");

   //If file can't be opened

   if (in.fail())

   {

       //Display message

       cout << "file did not open please check it\n";

       //Pause console window

       system("pause");

       //Exit

       system("exit");

   }

   //Define array

   studentType sList[20];

   //Call "getData()"

   getData(in, sList, 20);

   //Call "calculateGrade()"

   calculateGrade(sList, 20);

   //Call "printResult()"

   printResult(sList, 20);

   //Close

   in.close();

   //Pause console window

   system("pause");

   //Return 0

   return 0;

}

//Define getData()

void getData(ifstream& inFile, studentType sList[], int listSize)
{

   //Declare variables

   int n = 0;

   //Loop until list size

   while (n<listSize)

   {

       //Store data
       string lineOfFile = "";
       getline(inFile, lineOfFile);
       istringstream iss(lineOfFile);
       if (lineOfFile != "") {
           int numWord = 1;
           do
           {
               std::string sub;
               iss >> sub;
               if (numWord == 1)
                   sList[n].studentFirstName = sub;
               else if (numWord == 2)
                   sList[n].studentMiddleName = sub;
               else if (numWord == 3)
                   sList[n].studentLastName = sub;
               numWord++;
               //std::cout << "Substring: " << sub << std::endl;
           } while (!iss.eof());

           // means only 2 words were entered... example first and last
           if (numWord == 3) {
               sList[n].studentLastName = sList[n].studentMiddleName;
               sList[n].studentMiddleName = "";
           }

           inFile >> sList[n].testScore;
           //inFile >> sList[n].studentLastName >> sList[n].studentFirstName >> sList[n].testScore;

           //Increment counter

           n++;
       }

   }

}

//Define calculateGrade()

void calculateGrade(studentType sList[], int listSize)

{

   //Declare variable

   int i;

   //Loop until length

   for (i = 0; i<listSize; i++)

       //If score less than 60

       if (sList[i].testScore<60)

           //Set grade

           sList[i].grade = 'F';

   //If score less than 70

       else if (sList[i].testScore<70)

           //Set grade

           sList[i].grade = 'D';

   //If score less than 80

       else if (sList[i].testScore<80)

           //Set grade

           sList[i].grade = 'C';

       //If score less than 90

       else if (sList[i].testScore<90)

           //Set grade

           sList[i].grade = 'B';

       //If score greater than 90

       else

           //Set grade

           sList[i].grade = 'A';

}

//Define highestScore()

int highestScore(const studentType sList[], int listSize)

{

   //Declare variables

   int high = 0, i;

   //Loop until length

   for (i = 0; i<listSize; i++)

       //If high value is less than score

       if (high < sList[i].testScore)

           //Set score as high

           high = sList[i].testScore;

   //Return high

   return high;

}

//Define printResult()

void printResult(const studentType sList[], int listSize)

{

   //Display result

   cout << left << setw(30) << "Student Name" << right << setw(10) << "TestScore" << right << setw(7) << "Grade" << endl;

   //Declare variables

   string name;

   int high, i;

   //Loop until length

   for (i = 0; i<listSize; i++)

   {

       //Set name

       name = sList[i].studentLastName + " " + sList[i].studentMiddleName + " " + sList[i].studentFirstName;

       //Display message

       cout << left << setw(30) << name << right << setw(10) << sList[i].testScore << right << setw(7) << sList[i].grade << endl;

   }

   //Set new line

   cout << endl;

   //Call highestScore()

   high = highestScore(sList, listSize);

   //Display message

   cout << "Highest Test Score: " << high << endl;

   //Display result

   cout << "Students having the highest test score: " << endl;

   //Loop until length

   for (int i = 0; i < listSize; i++)

       //If score is high

       if (sList[i].testScore == high)

           //Display student name

           cout << sList[i].studentLastName << " " << sList[i].studentMiddleName << " " << sList[i].studentFirstName << endl;

}