Question

chapter 9 defined the struct studentType to implement the basic properties of a student. Define the class studentType with the same components as the struct studentType,and add member functions to manipulate the data members. (Note that the data members of the class studentType must be private.) Write a program to illustrate how to use the class studentType.

Answer 1

thanks for the question, the question is missing the previous studentType struct, nevertheless I have demonstrated how you need to create the same struct as a class.

I have used two strings for the first and last name, one double for GPA score and one int for id. You can add any more number of instance variables in the class.

At the end i have created one main() class that sets the values to a object using setter member functions and later prints them using the getter functions.

Make sure you create 3 files as given in the screenshot.

==============================================================

#ifndef STUDENTTYPE_H
#define STUDENTTYPE_H
#include<string>

using std::string;

class StudentType
{
   public:
      
       StudentType();
       StudentType(string,string,double,int);
       void setFirstName(string);
       void setLastName(string);
       void setGPA(double);
       void setStudentID(int);
      
       string getFirstName()const;
       string getLastName() const;
       string getFullName() const;
       double getGPA()const;
       int getStudentID() const;
      
      
   private:
       string firstName;
       string lastName;
       double GPA;
       int studentID;
};

#endif

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#include "StudentType.h"
#include<string>

using std::string;

StudentType::StudentType():
   firstName(""),lastName(""),GPA(0.0),studentID(0){
      
   }
StudentType::StudentType(string fname, string lname, double gpa, int id):
   firstName(fname),lastName(lname),GPA(gpa),studentID(id){
      
   }
void StudentType::setFirstName(string name){
   firstName=name;
}
void StudentType::setLastName(string name){
   lastName=name;
}
void StudentType::setGPA(double gpa){
   GPA=gpa;
}
void StudentType::setStudentID(int id){
   studentID=id;
}

string StudentType::getFirstName()const { return firstName;}
string StudentType::getLastName() const{return lastName;}
string StudentType::getFullName() const {return firstName+" "+lastName;}
double StudentType::getGPA()const {return GPA;}
int StudentType::getStudentID() const {return studentID;}

===============================================================

#include "StudentType.h"
#include <iostream>
#include<string>
using namespace std;

int main(){
  
   StudentType sam = StudentType();
  
   sam.setFirstName("Samuel");
   sam.setLastName("Gomez");
   sam.setGPA(4.7);
   sam.setStudentID(123);
  
  
   cout<<sam.getFullName()<<endl
       <<"Student ID: "<<sam.getStudentID()<<endl
       <<"GPA Score: "<<sam.getGPA()<<endl;
      
}

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