Design and Create a Menu for your Database
Examples:
Employee Database:
void main(){
load();
char choice='0';
while (choice!='e'&&choice!='E'){
cout<<endl<<"Payroll Database"<<endl;
cout<<"1. Insert Employee Record and Compute Net Pay"<<endl;
cout<<"2. Display All Records"<<endl;
cout<<"3. Search Database"<<endl;
cout<<"4. Update Record"<<endl;
cout<<"5. Delete Record"<<endl;
cout<<"6. Generate Report"<<endl;
cout<<"7. Delete Database File"<<endl;
cout<<"8. Back-up Database File"<<endl;
cout<<endl<<" Type e to exit"<<endl<<endl;
cout<<"Enter the number of your choice:";
cin>>choice; cout<<endl;
switch (choice){
case '1': insert(); break;
case '2': display(); break;
case '3': char s[100]; int index;
cout<<"Enter the last name of the person you want: ";
cin>>s;
index=search(s);
if(index!=-1) {
cout<<"Name: "<<e[index].fname<<" "<<e[index].lname<<endl;
cout<<"Hourly Rate: "<<e[index].hourlyrate<<endl;
cout<<"Hrs Worked: "<<e[index].hoursworked<<endl;
cout<<"Net Pay: "<<e[index].netpay<<endl<<endl;}//IF
else cout<<"EMPLOYEE NOT FOUND"<<endl;
break;
case '4': update(); break;
case '5': deleterec(); break;
case '6': report(); break;
case '7': deletefile(); break;
case '8': backupfile(); break;
case 'e': store(); break; //EXIT
default: cout<<"Invalid Choice"<<endl; break; }//SWITCH
}//WHILE
}//MAIN
Java example:
public static void main( String args[] ) throws IOException{
Database db = new Database();
Cin read = new Cin();
db.load();
int choice = 0;
do{System.out.println("\t1-Insert");
System.out.println("\t2-Display");
System.out.println("\t3-Search");
System.out.println("\t4-Modify");
System.out.println("\t5-Remove");
System.out.println("\t6-Quit");
choice = read.readInt();
if( choice == 1 ) db.insert();
else if( choice == 2 ) db.display();
else if( choice == 3 ) db.search();
else if( choice == 4 ) db.modify();
else if ( choice == 5 ) db.remove();
else if ( choice == 6 ) db.quit();
else System.out.println("Enter correct number");
} while(true);
}//MAIN
From Chapter 2:
1. #include <iostream.h>
2.
3. main() {
4. cout << " Ebrahimi Bank of New York”<<endl;
5. cout << ” Old Westbury, NY 11568”<<endl<<endl;
6. cout << ”\t 1. Deposit \t\t 2. Withdraw”<<endl;
7. cout << ”\t 3. Transfer \t\t 4. Loan”<<endl;
8. cout << ”\t 5. Balance \t\t 6. Help”<<endl;
9. return 0;
10. }//MAIN
Student Database:
Student Menu (S)
Course Menu (C)
Exit (E)
Student Menu
Add (A)
Update (U)
Search by Last Name (L)
Search by ID (I)
Save (S)
Course Menu
Add (A)
Update (U)
Search by CRN (L)
Save (S)
#include<fstream>
#include<string>
#include<iostream>
#include<iomanip>
using namespace std;
class course{
public:
string CRN;
string title;
string department;
string room;
}; //course
class student{
public:
string fname, lname, major;
double gpa;
}; //student
class university{
private:
student e[100];
course c[100];
int n;
int z;
public:
void load(){
n=0;
z=0;
ifstream studentFile("students.txt", ios::in);
ifstream courseFile("courses.txt", ios::in);
while(studentFile>>e[n].fname>>e[n].lname>>e[n].major>>e[n].gpa){
n++;}//WHILE
while(courseFile>>c[z].CRN>>c[z].title>>c[z].department>>c[z].room){
z++;}//WHILE
}//LOAD
void store(){
ofstream studentFile("students.txt",ios::out);
for(int i=0; i<n; i++){
if(e[i].fname!=" ")
studentFile<<e[i].fname<<" "<<e[i].lname<<" "<<e[i].major<<" "<<e[i].gpa<<endl;
}//FOR
ofstream courseFile("courses.txt", ios::out);
for(int j=0; j<z; j++){
if(c[j].CRN!=" ")
courseFile<< c[j].CRN << " "<<c[j].title << " "<<c[j].department << " "<<c[j].room<<endl;
}//FOR
}//STORE
void insert(){
cout<<"Enter student's first name: "; cin>>e[n].fname;
cout<<"Enter student's last name: "; cin>>e[n].lname;
cout<<"Enter student's major: "; cin>>e[n].major;
if(cin.fail()){
cout<<"Error\n"; exit(1);}
cout<<"Enter studen's gpa: ";
cin>>e[n].gpa;
n++;
}//INSERTS THE RECORD TO ARRAY
void addCourse( ){
cout<<"Enter course CRN: ";
cin>>c[z].CRN;
cout<<"Enter course title: ";
cin>>c[z].title;
cout<<"Enter course room: ";
cin>>c[z].room;
cout<<"Enter course department: ";
cin>>c[z].department;
z++;
}//addCourse
int searchCourse(string crn){
for(int i=0;i<z;i++) if(crn==c[i].CRN) return i;//FOR
return -1;
}//SEARCH COURSE BY CRN
void display(){
cout<<setiosflags(ios::left)<<setw(15)<<"First Name"<<setw(15)<<"Last Name";
cout<<setw(10)<<"Major"<<setw(10)<<"GPA";
cout<<endl<<endl;
cout<<setiosflags(ios::fixed|ios::showpoint|ios::left);
for(int i=0;i<n;i++){
if(e[i].fname!=" "){
cout<<setiosflags(ios::left)<<setw(15)<<e[i].fname<<setw(15)<<e[i].lname;
cout<<setprecision(2)<<setiosflags(ios::left)<<setw(10)<<e[i].major;
cout<<setw(10)<<e[i].gpa;
cout<<resetiosflags(ios::left)<<endl;}//IF
}//FOR
}//THIS FUNCTION DISPLAYS ALL RECORDS IN ARRAY
int search(string s){
for(int i=0;i<n;i++) if(s==e[i].lname) return i;//FOR
return -1;
}//SEARCH BY NAME,-1 NOT FOUND
void update(){
string searchn;
cout<<"Enter the Last Name of the Student to be modified: "; cin>>searchn;
int i=search(searchn);
if(i==-1) cout<<"STUDENT NOT LISTED"<<endl;
else{
cout<<endl<<"Please enter the updated information."<<endl;
cout<<"Enter student's first name: "; cin>>e[i].fname;
cout<<"Enter student's last name: "; cin>>e[i].lname;
cout<<"Enter major: "; cin>>e[i].major;
cout<<"Enter gpa: "; cin>>e[i].gpa;
}//ELSE
}//UPDATE
void deletefile(){
int pword;
cout<<"Enter your administrative password: "; cin>>pword;
if(pword==5438){
ofstream record("students.txt", ios::out);
record<<endl;
load();
record.close();}
else cout<<"Wrong password entered."<<endl;
}//DELETE FILE
void backupfile(){
system("copy students.txt backup.txt");
cout<<endl<<"Back-up file has been made."<<endl;
}//BACKUPFILE use cp command for UNIX
void studentmenu(){
char choice='z';
system("cls");
cout<<"Student Menu"<<endl<<endl;
cout<<"1. Insert Student Record"<<endl;
cout<<"2. Display All Records"<<endl;
cout<<"3. Search by Last Name"<<endl;
cout<<"4. Search by Student ID"<<endl;
cout<<"5. Update Record"<<endl;
cout<<"8. Delete Database File"<<endl;
cout<<"9. Back-up Database File"<<endl;
cin>>choice;
switch (choice){
case '1': insert(); break;
case '2': display(); break;
case '3':
char s[100]; int index;
cout<<"Enter the last name of the student you want: ";
cin>>s;
index=search(s);
if(index!=-1) {
cout<<"Name: "<<e[index].fname<<" "<<e[index].lname<<endl;
cout<<"Major: "<<e[index].major<<endl;
cout<<"GPA: "<<e[index].gpa<<endl;
}//IF
else cout<<"STUDENT NOT FOUND"<<endl;
break;
case '4':
int id;
cout<<"Enter Student ID: " ;
cin>>id;
if(id < n){
cout<<"Name: "<<e[id].fname<<" "<<e[id].lname<<endl;
cout<<"Major: "<<e[id].major<<endl;
cout<<"GPA: "<<e[id].gpa; }
else cout<<"Student not found"<<endl;
break;
case '5': update(); break;
case 'e': store(); break; //EXIT
default: cout<<"Invalid Choice"<<endl; break; }//SWITCH
}//studentmenu
void coursemenu(){
char choice='z';
system("cls");
cout<<"Course Menu"<<endl;
cout<<"Add Course (a)"<<endl;
cout<<"Search for Course (s)"<<endl;
cin>>choice;
switch(choice){
case 'a': addCourse(); break;
case 's':
char crn[100]; int index;
cout<<"Enter the CRN of the course: ";
cin>>crn;
index=searchCourse(crn);
if(index!=-1) {
cout<<"CRN: "<<c[index].CRN<<endl;
cout<<"Title: "<<c[index].title<<endl;
cout<<"Room: "<<c[index].room<<endl;
cout<<"Department: "<<c[index].department<<endl;
}//IF
else cout<<"COURSE NOT FOUND"<<endl;
break;break;
default: cout<<"Invalid Choice"<<endl; break;
}//SWITCH
}//coursemenu
};
void main(){
university OW;
OW.load();
char choice='z';
while (choice!='e'&&choice!='E'){
cout<<endl<<"SUNY OW Database"<<endl<<endl;
cout<<"Student Menu (s)"<<endl;
cout<<"Course Menu (c)"<<endl;
cout<<endl<<" Type e to exit"<<endl<<endl;
cin>>choice;
switch(choice){
case 's':
OW.studentmenu();
break;
case 'c':
OW.coursemenu();
break;
case 'e': OW.store(); break; //EXIT
default: cout<<"Invalid Choice"<<endl; break; }//SWITCH
}//WHILE
}//MAIN