Download C++ Program for Managing Student Records and more Exercises Object Oriented Programming in PDF only on Docsity!
#include #include <string.h> #include #include <process.h> #include
using namespace std;
class cStudent { private: int registration; char first_name[50]; char last_name[50];
int semester; double GPA; double CGPA;
public: cStudent(): registration(0), GPA(0.0), CGPA(0.0), semester(1) { strcpy(first_name, ""); strcpy(last_name, ""); }
void set_student(int reg, char* fn, char* ln, double gp, double cgp, int sem) { semester = sem; registration = reg; strcpy(first_name, fn); strcpy(last_name, ln); GPA = gp; CGPA = cgp; }
void update_fname(char* fn) { strcpy(first_name, fn); }
void update_lname(char* ln) { strcpy(last_name, ln); }
void update_gpa(double gp) { GPA = gp; }
void update_cgpa(double cgp) { CGPA = cgp; }
void update_sem(int sem) { semester = sem; }
int get_reg() { return registration; }
char* get_first() { return first_name; }
char* get_last() { return last_name; }
double get_gpa() { return GPA; }
double get_cgpa() { return CGPA; }
int get_sem() { return semester; }
};
/* void main() { int reg; char fn[50]; char ln[50]; int sem; double gp; double cgp;
char option = 'y';
//a student object cStudent student;
//open the student record file for writing ofstream file("StudentRecord.bin", ios::binary | ios::out);
if(!file) { cout<<"Error opening the file!"; exit(0);
void main() { int reg;
char ed_opt; char ex_opt;
//a student object cStudent student;
//open the student record file for reading and writing fstream file("StudentRecord.bin", ios::binary | ios::out | ios::in);
if(!file) { cout<<"Error opening the file!"; exit(0); }
cout<<"-----Student Records-----"<<endl;
while(1) { cout<<"Enter Student Registration"<<endl; cin>>reg;
file.seekg((reg - 1) * sizeof(cStudent)); file.read(reinterpret_cast<char*> (&student), sizeof(cStudent));
cout<<setw(12)<<"Registration"<<setw(12)<<"First Name"<<setw(12) <<"Last Name"<<setw(10)<<"Semester"<<setw(5)<<"GPA"<<setw(5) <<"CGPA"<<endl;
cout<<setw(12)<<student.get_reg()<<setw(12)<<student.get_first()
<<setw(12)<<student.get_last()<<setw(10)<<student.get_sem()
<<setw(5)<<student.get_gpa()<<setw(5)<<student.get_cgpa()<<endl;
cout<<"Edit the Record (y/n) ?"<<endl; cin>>ed_opt;
if(ed_opt == 'y') { edit_student(student);
file.seekp((reg - 1) * sizeof(cStudent)); file.write(reinterpret_cast<const char*> (&student), sizeof(cStudent)); }
cout<<"Retrieve another Record (y/n) ?"<<endl; cin>>ex_opt;
if(ex_opt == 'n') break; }
file.close(); }
void edit_student(cStudent& student) { int option = 0;
char fn[50]; char ln[50]; int sem; double gp; double cgp;
cout<<setw(30)<<"Enter the following options"<<endl; cout<<setw(30)<<"Edit First Name? (1)"<<endl; cout<<setw(30)<<"Edit Last Name? (2)"<<endl; cout<<setw(30)<<"Edit GPA? (3)"<<endl; cout<<setw(30)<<"Edit CGPA? (4)"<<endl; cout<<setw(30)<<"Edit Semester? (5)"<<endl;
cin>>option;
switch (option) { case 1: cout<<"Enter First Name"<<endl; cin>>fn; student.update_fname(fn); break;
case 2: cout<<"Enter Last Name"<<endl; cin>>ln; student.update_lname(ln); break;
case 3: cout<<"Enter GPA"<<endl; cin>>gp; student.update_gpa(gp); break;
