Write a program that will read student\'s ID, first name, last name, and 5 score

ID: 3810141 • Letter: W

Question

Write a program that will read student's ID, first name, last name, and 5 scores from an input file "hw2data. txt". The 5 scores are midterm exam score, final exam score, homework score, lab score, and quiz score. The program calculates a student's weighted total based on the formula: Weighted total 25% (midterm score) 25%(final exam score) 30%(homework score) 10%(lab score) 10% (quiz score And then assigns a letter grade to student using the grade scale 90 weighted total 100 A 80 weighted total 90 70 weighted total 80 60 weighted total 70 0 weighted total 60 The program should output each student's ID, full name, 5 scores, weighted total, and letter grade in a neat format. Your program should define a class Student and implement it as required. The class Student should have the following private member variables. Member Variable Description ID An int variable that holds a student's ID first Name A string variable that holds a student's first name. lastName A string variable that holds a student's last name. An int array that holds a student's 5 scores in the order of midterm exam S Core S score, final exam score, homework score, lab score, and quiz score.

Explanation / Answer

#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
#define MAX 100
using namespace std;

class Student
{
   int ID;
   string firstName;
   string lastName;
   //theare are 5 scores
   int scores[5];
public:
   Student();
   Student(int ID, string fname, string lname, int arr_score[]);
   void setID(int id);
   void setFName(string fname);
   void setLName(string lname);
   void setScores(int a[]);
   int getID();
   string getFName();
   string getLName();
   float getWeightedTotal();
   char getGrade(float weighted_total);
   void printStudent();
};

Student::Student()
{
   ID = 0;
   firstName = "";
   lastName = "";
   //set all score values to 0
   for (int i = 0; i < 5; i++)
       scores[i] = 0;
}
Student::Student(int ID, string fname, string lname, int arr_score[])
{
   ID = ID;
   firstName = fname;
   lastName = lname;
   //set all score values to 0
   for (int i = 0; i < 5; i++)
       scores[i] = arr_score[i];
}
void Student::setID(int id)
{
   ID = id;
}

void Student::setFName(string fname)
{
firstName = fname;
}

void Student::setLName(string lname)
{
lastName = lname;
}

void Student::setScores(int a[])
{
for (int i = 0; i < 5; i++)
scores[i] = a[i];
}

int Student::getID()
{
return ID;
}

string Student::getFName()
{
return firstName;
}

string Student::getLName()
{
return lastName;
}

float Student::getWeightedTotal()
{
float weighted_total ;

weighted_total = 0.25*scores[0] + 0.25 * scores[1] + 0.30*scores[2] + 0.10*scores[3] + 0.10*scores[4];
return weighted_total;

}

char Student::getGrade(float weighted_total)
{
char grade;

   if (weighted_total >= 90 && weighted_total <= 100)
   {
       grade = 'A';
       return grade;
   }
   if (weighted_total >= 80 && weighted_total < 90)
   {
       grade = 'B';
       return grade;
   }
   if (weighted_total >= 70 && weighted_total< 80)
   {
       grade = 'C';
       return grade;
   }
   if (weighted_total >= 60 && weighted_total< 70)
   {
       grade = 'D';
       return grade;
   }
   if (weighted_total >= 0 && weighted_total < 60)
   {
       grade = 'E';
       return grade;
   }

}

void Student::printStudent()
{
   float total = getWeightedTotal();
   char grade = getGrade(total);
   cout << setw(5) << getID() << " " << setw(10) << getFName() << " " << setw(10) << getLName() << " " << setw(6) << total << " " << setw(1) << grade << endl;
}

int main()
{
   //declare array of objects students
   Student s[MAX];
   //declare input stream to read from file hw2data.txt
   ifstream in;
   //open file student.txt
   in.open("hw2data.txt");
   //check if file open
   if (!in)
   {
       cout << "Can't open the input file hw2data.txt" << endl;
       return -1;
   }

   //decalre variable to read values from file
   int s1[5];
   int id,count = 0;;
   string fname, lname;
   //read from file till EOF(end of file)
   while (!in.eof())
   {
       in >> id >> fname >> lname;
       for (int i = 0; i < 5; i++)
           in >> s1[i];
       //set the student member variable with read values
       s[count].setID(id);
       s[count].setFName(fname);
       s[count].setLName(lname);
       //set test scores
       for (int i = 0; i < 5; i++)
           s[count].setScores(s1);
       ++count;
   }

   cout << setw(5) << "ID" << " " << setw(10) << "First_name" << " " << setw(10) << "Last_name" << " " << setw(6) << "Weighted_total" << " " << setw(1) << "Grade" << endl;
   for (int i = 0; i < count; i++)
   {
       //calculate weighted total and grade
       s[i].printStudent();
   }

}

---------------------------------------------------------------------------------------------------

//output

ID First_name Last_name Weighted_total Grade
12002 Johnson R 81.8 B
11201 Aniston s 85.1 B
13290 Cooper w 59.35 E
14500 Gupta b 68.35 D
13290 Blair a 55.5 E
15678 Clark k 60.35 D
15653 Kennedy p 58.3 E
18976 Bronson s 90.85 A
24576 Sunny v 66.9 D
32456 Smith k 67.75 D

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Write a program that will read student’s ID, first name, last name, and 5 scores

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Write a program that will read student\'s ID, first name, last name, and 5 score

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