How do make a C++ console application for a Gym - Gym management system

In this post I'll show you a code of a C++ project which I was involved in a couple of days ago. This C++ project is about  a  member management system to a Gymnasium. In this application, first you have to login to the application using a user name and password. The user name and password is "admin" and "password" in simple letters.

after you logged in you can add a member to the system and see all members and find a member by the members ID and you can delete a member. those are the main functions of this application. here are few screen shots of this application

I was tested this application on Code Blocks. and here is the code

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/* ==================================================== |**************************************************| |**** Atlas Gymnasium Member Management System ****| |**************************************************| |****** C++ code explanations and comments ******| |**************************************************| |****** By Yuhanthika rasangani de silva *********| |**************************************************| ==================================================== */ // All the header files that needed to this console program #include <iostream> #include <fstream> #include <iomanip> #include <stdlib.h> #include <conio.h> #include <string> using namespace std; // Member class that all the variable are included class member { int idnum; char fname[50]; char sname[50]; char address[100]; int cnumber; int age; public: void getdata(); // Get inputs from the user void showdata() const; // Show previously inputed data int getIDNum() const; // Get ID number }; // Method that takes inputs from the user void member::getdata() { cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout<<"\nENTER THE MEMBER ID: "; cin>>idnum; cout<<"\n\nENTER FIRST NAME: "; cin.ignore(); cin.getline(fname,50); cout<<"\n\nENTER SURNAME: "; //cin.ignore(); cin.getline(sname,50); cout<<"\n\nENTER ADDRESS: "; //cin.ignore(); cin.getline(address,100); cout<<"\n\nENTER CONTACT NUMBER: "; cin >> cnumber; cout<<"\n\nENTER AGE: "; cin>>age; } // show data according to the structure void member::showdata() const { cout<<"\nID NUMBER: "<<idnum; cout<<"\nFIRST NAME: "<<fname; cout<<"\nSURNAME: "<<sname; cout<<"\nADDRESS: "<<address; cout<<"\nCONTACT NUMBER: "<<cnumber; cout<<"\nAGE: "<<age; } // get id number and stored it in idnum variable. int member::getIDNum() const { return idnum; } // Member registering file handling methods // In this method the inputs which takes from user are stored in a data file called member.dat void add_member() { member st; ofstream outFile; outFile.open("member.dat",ios::binary|ios::app); st.getdata(); outFile.write(reinterpret_cast<char *> (&st), sizeof(member)); outFile.close(); cout<<"\n\nMEMBER DATA HAS BEEN CREATED!"; cin.ignore(); cin.get(); } // methods that output all the data stored in the member.dat file void display_all() { member st; ifstream inFile; inFile.open("member.dat",ios::binary); if(!inFile) { cout<<"FILE 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(member))) { st.showdata(); cout<<"\n\n====================================\n"; } inFile.close(); cin.ignore(); cin.get(); } // Display the relevant data according to the id number that user provides void display_sp(int n) { member st; ifstream inFile; inFile.open("member.dat",ios::binary); if(!inFile) { cout<<"FILE COULD NOT BE OPEN!! PRESS ANY KEY .."; cin.ignore(); cin.get(); return; } bool flag=false; while(inFile.read(reinterpret_cast<char *> (&st), sizeof(member))) { if(st.getIDNum()==n) { st.showdata(); flag=true; } } inFile.close(); if(flag==false) cout<<"\n\nRECORD NOT EXIST!"; cin.ignore(); cin.get(); } // Gets id number from the user and output the relevant data. // Edit data relevant to the user ID provided void edit_member(int n) { bool found=false; member st; fstream File; File.open("member.dat",ios::binary|ios::in|ios::out); if(!File) { cout<<"FILE COULD NOT BE OPEN !! PRESS ANY KEY..."; cin.ignore(); cin.get(); return; } while(!File.eof() && found==false) { File.read(reinterpret_cast<char *> (&st), sizeof(member)); if(st.getIDNum()==n) { st.showdata(); cout<<"\n\nPLEASE ENTER THE NEW DETAILS OF THE MEMBER "<<endl; st.getdata(); int pos=(-1)*static_cast<int>(sizeof(st)); File.seekp(pos,ios::cur); File.write(reinterpret_cast<char *> (&st), sizeof(member)); cout<<"\n\n\t RECORD UPDATED!"; found=true; } } File.close(); if(found==false) cout<<"\n\n RECORD NOT FOUND "; cin.ignore(); cin.get(); } // Delete the member relevant to the user inputed ID void delete_member(int n) { member st; ifstream inFile; inFile.open("member.dat",ios::binary); if(!inFile) { cout<<"FILE 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(member))) { if(st.getIDNum()!=n) { outFile.write(reinterpret_cast<char *> (&st), sizeof(member)); } } outFile.close(); inFile.close(); remove("member.dat"); rename("Temp.dat","member.dat"); cout<<"\n\n\tRECORD DELETED .."; cin.ignore(); cin.get(); } // Exit the console application void exit() { system("cls"); cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout << "\t\t\t THANK YOU!!!" << endl; exit(0); } // The main menu that the user interact with // Main outputs that user sees void main_menu() { char ch; int num; cout.setf(ios::fixed|ios::showpoint); cout<<setprecision(2); do { system("cls"); cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout<<"\t\t@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"; cout<<"\n\n\t\t1. ADD NEW MEMBER"; cout<<"\n\n\t\t2. DISPLAY ALL MEMBERS"; cout<<"\n\n\t\t3. SEARCH MEMBER"; cout<<"\n\n\t\t4. EDIT MEMBER"; cout<<"\n\n\t\t5. DELETE MEMBER"; cout<<"\n\n\t\t6. EXIT"; cout<<"\n\n\t\t@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"; cout<<"\n\n\t\tPLEASE ENTER YOUR CHOICE (1-6): "; cin>>ch; system("cls"); switch(ch) { case '1': add_member(); break; case '2': display_all(); break; case '3': cout<<"\n\n\tPLEASE ENTER MEMBER ID: "; cin>>num; display_sp(num); break; case '4': cout<<"\n\n\tPLEASE ENTER MEMBER ID: "; cin>>num; edit_member(num);break; case '5': cout<<"\n\n\tPLEASE ENTER MEMBER ID: "; cin>>num; delete_member(num);break; case '6': exit();break; default: cout<<"\a"; } }while(ch!='6'); } // user login window // Enter the application providing the exact username and password int main(){ string UserName; string Password =""; char ch; system("cls"); cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout << "\t_______________________________________________________" << endl; cout << "\tPLEASE ENTER USERNAME AND PASSWORD TO ENTER THE SYSTEM!" << endl; cout << "\t_______________________________________________________" << endl << endl; cout << "\tENTER USERNAME: "; cin >> UserName; cout << endl; cout << "\tENTER PASSWORD: "; ch = _getch(); while(ch != 13){//character 13 is enter Password.push_back(ch); cout << '*'; ch = _getch(); } if(UserName == "admin" && Password == "password"){ system("cls"); cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout << "\t\t\tACCESS GRANTED!" << endl; system("Pause"); main_menu(); }else{ cout << "\t\t ====================================" << endl; cout << "\t\t |---- ATLAS GYMNASIUM (PVT)LTD ----|" << endl; cout << "\t\t ====================================" << endl << endl << endl; cout << "\t\t\tACCESS ABORTED!...\n"; main(); } }

If you have any questions feel free to ask by commenting. And if you have any idea of developing this application please do share them with us!