Question

2. Write a program named lab3 2.app that contains a class named Student to store student information Information that will be relevant to store is first name, last name, id number, GPA, and major (1) Define a member function named set0, which allows you to set all member variables. This function has an empty parameter list, and its return type is void. So, within the function you'll prompt for information. Note: For entering major, if you need a space, use an underscore. (i e. Computer Science would be Compter Science) (2) Define a member function named print0 that prints a summary of the Student object. You can choose how this data is formatted to the screen (something readable please) (3) Create a driver file to test your class. You should instantiate at least 3 objects of Student type. Note, this should NOT be an array of Student. Just 3 different Student declarations Student -first_ name string - last name string İd : İnt - gpa: double - string major + set void + print void Sample Run (User input in bold)

Answer 1

3 Objects s1, s2 and s3 of Student type are declared and members of the three objects are set by prompting the user from the set() function. The details of all the objects are displayed using the print() function.

Code:

#include<iostream>
#include<iomanip>
#define FIX(x) std::fixed <<std::setprecision(1)<<(x)/*fixes precision of GPA to 1 so that only 1 number is printed after decimal*/
using namespace std;
class Student
{
   //member variables
   string first_name;
   string last_name;
   int id;
   double gpa;
   string major;
   public:
   //member functions
   void set()
   {
       //prompting user to enter input for all the member variables
       cout<<"First Name: ";cin>>first_name;
       cout<<"Last Name: ";cin>>last_name;
       cout<<"ID: ";cin>>id;
       cout<<"GPA: ";cin>>gpa;
       cout<<"Major: ";cin>>major;
   }
   void print()
   {
       //Showing summary in a user readable form
       cout << first_name << " " << last_name << " (" << id << ")" << " graduated with a " << FIX(gpa) << " GPA in " << major << "." << endl;
   }
};
int main()
{
   Student s1;//object 1 of Student type
   Student s2;//object 2 of Student type
   Student s3;//object 3 of Student type
   cout<<"Student Information Database"<<endl;
   cout<<"================================="<<endl;
   s1.set();//calling set method for objects
   s2.set();
   s3.set();
   cout<<"=========Summary============="<<endl;
   s1.print();//calling print method for objects
   s2.print();
   s3.print();
   return 0;
}

Output:

Student Information Database First Name: Elaine Last Name: Benes ID: 1961 PA: 4.e ajor: French_Literature First Name: George Last Name: Costanza ID 1959 PA 2.7 ajor: Architecture First Name: Cosmo Last Name: Kramer ID: 1949 PA: 3.5 ajor Business Summary Elaine Benes (1961) graduated with a 4.0 GPA in French_Literature. eorge Costanza (1959) graduated with a 2.7 GPA in Architecture. Cosmo Kramer (1949) graduated with a 3.5 GPA in Business. Process exited after 45.24 seconds with return value 0 Press any key to continue .. .