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C++ Program To Implement Student Report Card System.

#include<iostream>
#include<fstream>
#include<iomanip>
#include <cstdlib>
using namespace std;

class student {
int rollno;
char name[50];

int p_marks, c_marks, m_marks, e_marks, cs_marks;
double per;
char grade;
void calculate();

public:
void getdata();
void showdata() const;
void show_tabular() const;
int retrollno() const;
};

void student::calculate() {
per=(p_marks+c_marks+m_marks+e_marks+cs_marks)/5.0;
if(per>=60)
grade='A';

else if(per>=50) 
grade='B';
else if(per>=33)
grade='C';
else
grade='F';
}

void student::getdata() {
cout << "\n\n\tEnter The Roll Number Of Student : ";
cin >> rollno;

cout << "\n\n\tEnter The Name Of Student : ";
cin.ignore();
cin.getline(name,50);

cout << "\n\n\tMarks In Physics (Out Of 100) : ";
cin >> p_marks;
cout << "\n\n\tMarks In Chemistry (Out Of 100) : ";
cin >> c_marks;
cout << "\n\n\tMarks In Mathematics (Out Of 100) : ";
cin >> m_marks;

cout << "\n\n\tMarks In English (Out Of 100) : ";
cin >> e_marks;
cout << "\n\n\tMarks In Computer Science (Out Of 100) : ";
cin >> cs_marks;
calculate();
}

void student::showdata() const {
cout << "\n\n\tRoll Number Of Student : " << rollno;
cout << "\n\n\tName Of Student : " << name;
cout << "\n\n\tMarks In Physics : " << p_marks;

cout << "\n\n\tMarks In Chemistry : " << c_marks;
cout << "\n\n\tMarks In Maths : " << m_marks;
cout << "\n\n\tMarks In English : " << e_marks;
cout << "\n\n\tMarks In Computer Science :" << cs_marks;
cout << "\n\n\tPercentage : " << per;
cout << "\n\n\tGrade : " << grade;
}

void student::show_tabular() const {
cout << rollno<<setw(6)<<" "<<name<<setw(10)<<p_marks<<setw(4)<<c_marks<<setw(4)<<m_marks<<setw(4)
<<e_marks<<setw(4)<<cs_marks<<setw(8)<<per<<setw(6)<<grade<<endl;
}

int  student::retrollno() const {
return rollno;
}

void write_student();
void display_all();
void display_sp(int);
void modify_student(int);

void delete_student(int);
void class_result();
void result();
void intro();
void entry_menu();

int main() {
char ch;
cout.setf(ios::fixed|ios::showpoint);
cout << setprecision(2);
intro();

do {
system("cls");
cout << "\n\n\n\tMAIN MENU";
cout << "\n\n\t01. RESULT MENU";
cout << "\n\n\t02. ENTRY/EDIT MENU";
cout << "\n\n\t03. EXIT";
cout << "\n\n\tPlease Select Your Option (1-3) : ";
cin >> ch;

switch(ch) {
case '1': result();
break;

case '2': entry_menu();
break;
case '3':
break;

default :cout << "\a";
}}while(ch!='3');
return 0;
}

void write_student() {
student st;

ofstream outFile;
outFile.open("student.dat",ios::binary|ios::app);
st.getdata();

outFile.write(reinterpret_cast<char *> (&st), sizeof(student));
outFile.close();

cout << "\n\n\tStudent Record Has Been Created ";
cin.ignore();
cin.get();
}

void display_all() {
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);

if(!inFile) {
cout << "\n\n\tFile Could Not Be Open !! Press Any Key...";
cin.ignore();
cin.get();
return;
}

cout << "\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student))) {
st.showdata();
cout << "\n\n====================================\n";
}

inFile.close();
cin.ignore();
cin.get();
}

void display_sp(int n) {
student st;
ifstream inFile;
inFile.open("student.dat",ios::binary);

if(!inFile) {
cout << "\n\n\tFile Could Not Be Open !! Press Any Key...";

cin.ignore();
cin.get();
return;
}

bool flag=false;
while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student))) {

if(st.retrollno()==n) {
st.showdata();
flag=true;
}}

inFile.close();
if(flag==false)
cout << "\n\n\tRecord Not Exist.";
cin.ignore();
cin.get();
}

void modify_student(int n) {
bool found=false;
student st;

fstream File;
File.open("student.dat",ios::binary|ios::in|ios::out);

if(!File) {
cout << "\n\n\tFile Could Not Be Open !! Press Any Key...";
cin.ignore();
cin.get();
return;
}

while(!File.eof() && found==false) {
File.read(reinterpret_cast<char *> (&st), sizeof(student));

if(st.retrollno()==n) {
st.showdata();

cout << "\n\nPlease Enter The New Details Of Student : " << endl;
st.getdata();

int pos=(-1)*static_cast<int>(sizeof(st));
File.seekp(pos,ios::cur);
File.write(reinterpret_cast<char *> (&st), sizeof(student));

cout << "\n\n\tRecord Updated.";
found=true;
}}

File.close();
if(found==false)
cout << "\n\n\tRecord Not Found.";

cin.ignore();
cin.get();
}

void delete_student(int n) {
student st;

ifstream inFile;
inFile.open("student.dat",ios::binary);

if(!inFile) {
cout << "\n\n\tFile Could Not Be Open !! Press Any Key...";

cin.ignore();
cin.get();
return;
}

ofstream outFile;
outFile.open("Temp.dat",ios::out);
inFile.seekg(0,ios::beg);

while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student))) {
if(st.retrollno()!=n) {
outFile.write(reinterpret_cast<char *> (&st), sizeof(student));
}}

outFile.close();
inFile.close();
remove("student.dat");
rename("Temp.dat","student.dat");

cout << "\n\n\tRecord Deleted ..";
cin.ignore();
cin.get();
}

void class_result() {
student st;

ifstream inFile;
inFile.open("student.dat",ios::binary);

if(!inFile) {
cout << "\n\n\tFile Could Not Be Open !! Press Any Key...";
cin.ignore();
cin.get();
return;
}

cout << "\n\n\t\tALL STUDENTS RESULT \n\n";
cout << "==========================================================\n";
cout << "R.No       Name        P   C   M   E   CS   %age   Grade"<<endl;
cout << "==========================================================\n";

while(inFile.read(reinterpret_cast<char *> (&st), sizeof(student))) {
st.show_tabular();
}

cin.ignore();
cin.get();
inFile.close();
}

void result() {
char ch;
int rno;

cout << "\n\n\n\tRESULT MENU";
cout << "\n\n\n\t1. Class Result";
cout << "\n\n\t2. Student Report Card";
cout << "\n\n\t3. Back To Main Menu";
cout << "\n\n\n\tEnter Choice (1/2/3)? ";
cin >> ch;

switch(ch) {
case '1' :      class_result(); break;
case '2' :      cout << "\n\n\tEnter Roll Number Of Student : "; cin >> rno;
display_sp(rno); break;

case '3' :      break;
default:       cout << "\a";
}}

void intro() {
cout << "\t*** STUDENT REPORT CARD PROJECT ***";
cout << "\n\n\n\tMADE BY : MOHAMMAD A M BHUIYAN";
cout << "\n\tSCHOOL : CSU NORTHRIDGE";
cin.get();
}

void entry_menu() {
char ch;
int num;

cout << "\n\n\n\tENTRY MENU";
cout << "\n\n\t1.CREATE STUDENT RECORD";
cout << "\n\n\t2.DISPLAY ALL STUDENTS RECORDS";
cout << "\n\n\t3.SEARCH STUDENT RECORD ";

cout << "\n\n\t4.MODIFY STUDENT RECORD";
cout << "\n\n\t5.DELETE STUDENT RECORD";
cout << "\n\n\t6.BACK TO MAIN MENU";
cout << "\n\n\tPlease Enter Your Choice (1-6) : ";
cin >> ch;

switch(ch) {
case '1':       write_student(); break;
case '2':       display_all(); break;

case '3':       cout << "\n\n\tPlease Enter The Roll Number : "; cin >> num;
display_sp(num); break;

case '4':       cout << "\n\n\tPlease Enter The Roll Number : "; cin >> num;
modify_student(num);break;

case '5':       cout << "\n\n\tPlease Enter The Roll Number : "; cin >> num;
delete_student(num);break;

case '6':       break;
default:       cout << "\a"; entry_menu();
}}
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