Question

This should be written in C++.

Create a class with the name "Student".

private data members of the Student class should include:

int - rollno (roll number or id number of student)

string - name (name of student)

int - alg, datastruct, architect, proglang (hold scores out of 100 for these 4 classes)

float - per (average score of 4 classes above)

char - grade (letter grade based on per.. example 90 is an A)

public member functions of the Student class should include:

getdata() (function to accept data from user

showdata() (function to show data on screen

Create a constructor that initializes all int to 0, float to 0.0, char to ' ', name = "NoName".

Prompt the user for a valid class size.

Prompt the user for student data.

Store students in a vector.

Display student data including students average score and letter grade.

The following is an example:

Enter size of class: 0
Invalid class size

Enter size of class: 1

Enter the roll number of student: 45
Enter The Name of student: Trish Duce
Enter the grade in Algorithms out of 100: 88
Enter the grade in Data Structures out of 100: 94
Enter the grade in Architecture out of 100: 98
Enter the grade in Programming Languages out of 100: 92

Roll number of student: 45
Name of student: Trish Duce
Grade in Algorithms: 88
Grade in Data Structures: 94
Grade in Architecture: 98
Grade in Programming Languages: 92
Percentage of student is: 93
Grade of student is: A

Answer 1

#include <iostream>
#include <cmath>
#include <iomanip>
#include <vector>
using namespace std;

// Creating the Student class
class Student
{
private:
// Declaring variable
int rollno;
string name;
int alg, datastruct, architect, proglang;
float per;
char grade;

public:
// Parameterized constructor
Student()
{
this->rollno = 0;
this->name = "NoName";
this->alg = 0;
this->datastruct = 0;
this->architect = 0;
this->proglang = 0;
this->per = 0.0;
this->grade = ' ';
}
// function declarations
void getData();
void showdata();

// Setters and getters
int getRollno()
{
return rollno;
}
void setRollno(int rollno)
{
this->rollno = rollno;
}
string getName()
{
return name;
}
void setName(string name)
{
this->name = name;
}
int getAlg()
{
return alg;
}
void setAlg(int alg)
{
this->alg = alg;
}
int getDatastruct()
{
return datastruct;
}
void setDatastruct(int datastruct)
{
this->datastruct = datastruct;
}
int getArchitect()
{
return architect;
}
void setArchitect(int architect)
{
this->architect = architect;
}
int getProglang()
{
return proglang;
}
void setProglang(int proglang)
{
this->proglang = proglang;
}
float getPer()
{
return per;
}
void setPer(float per)
{
this->per = per;
}
char getGrade()
{
return grade;
}
void setGrade(char grade)
{
this->grade = grade;
}
};

/* Function implementatin which
* gets the data entered by the user
*/
void Student::getData()
{
double average = 0.0, sum = 0.0;
cout << "Enter the roll number of student: ";
cin >> this->rollno;
cin.ignore();
cout << "Enter The Name of student:";
std::getline(std::cin, this->name);
cout << "Enter the grade in Algorithms out of 100: ";
cin >> this->alg;
cout << "Enter the grade in Data Structures out of 100: ";
cin >> this->datastruct;
cout << "Enter the grade in Architecture out of 100: ";
cin >> this->architect;
cout << "Enter the grade in Programming Languages out of 100: ";
cin >> this->proglang;
sum += this->getAlg() + this->getDatastruct() + this->getArchitect() + this->getProglang();
average = sum / 4;
this->setPer(average);
if (getPer() >= 90 && getPer() <= 100)
this->setGrade('A');
else if (getPer() >= 80 && getPer() < 90)
this->setGrade('B');
else if (getPer() >= 70 && getPer() < 80)
this->setGrade('C');
else if (getPer() >= 60 && getPer() < 70)
this->setGrade('D');
else if (getPer() < 60)
this->setGrade('F');
}

// Function which displays the Student's data
void Student::showdata()
{

cout << "Roll number of student: " << this->getRollno() << endl;
cout << "Name of student: " << this->getName() << endl;
cout << "Grade in Algorithms: " << this->getAlg() << endl;
cout << "Grade in Data Structures: " << this->getDatastruct() << endl;
cout << "Grade in Architecture: " << this->getArchitect() << endl;
cout << "Grade in Programming Languages: " << this->getProglang() << endl;
cout << "Percentage of student is: " << this->getPer() << endl;
cout << "Grade of student is: " << this->grade << endl;
}
int main()
{

// Declaring vector
vector<Student> vec;
// Declaring variables
int size;

// Getting the valid size entwered by the user
while (true)
{
cout << "Enter the size of the class :";
cin >> size;
if (size <= 0)
{
cout << "Invalid class size" << endl;
continue;
}
else
break;
}

/* Getting the data entered by user
* by calling the getData() function
* on the Student class
*/
for (int i = 0; i < size; i++)
{
Student st;
st.getData();
vec.push_back(st);
}
cout << endl;
/* Displaying the data entered by user
* by calling the showData() function
* on the Student class
*/
for (int i = 0; i < size; i++)
{
vec[i].showdata();
}

return 0;
}

_________________

output:

_______________Thank You