C++ Programming Examples
C++ is the most popular and practically used programming language. This language basically works on the oop concepts. C++ programming can be learned with the help of C++ programming examples. Management systems are primarily based on C++ programming using oop concepts so, C++ programming examples are mostly about management systems.
Here is a code of the Prison Management System as a C++ programming example code:
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Prisoners Management System
#include <iostream>
#include <string>
#include <string.h>
#include<conio.h>
using namespace std;
/// <summary>
/// Prison class has all the attributes of prisoners and is a base class, so we made it abstract. Abstraction
/// Prisoner Details class is a child class of Prison and has an overload of functions to print details. Polymorphism
/// Release Prison class has the implementation to del the data of a given prisoner from the object of the array.
/// Attendances class has the implementation to take attendance of prisoners.
/// Guard Class is generating guards automatically to the number of cells and gives unique ids to guards and assigns the duty of each guard to each cell.
/// Generic Global Function applying Linear Search Algorithm for Searching Prisoners.
/// Global Show() function is to design the interface.
/// Global Login() function is to apply the login system.
/// </summary>
class Prison
{
public:
string name;
string crime;
int cellno;
int age;
int duration;
string dateofentry;
string ID;
public:
Prison()
{
}
Prison(string n,string cr, int ce, int a, int d, string doe)
{
name = n;
crime = cr;
cellno = ce;
age = a;
duration = d;
dateofentry = doe;
}
void setname(string n)
{
name = n;
}
void setcrime(string c)
{
crime = c;
}
void setid(string id)
{
ID = id;
}
void setcellno(int cl)
{
cellno = cl;
}
void setage(int a)
{
age = a;
}
void setduration(int d)
{
duration = d;
}
void setdateofentry(string doe)
{
dateofentry = doe;
}
virtual int getcellno() = 0;
virtual string getID() = 0;
};
class PrisonersDetails : public Prison
{
public:
PrisonersDetails(string n, string cr, int ce, int a, int d, string doe) : Prison(n, cr, ce, a, d, doe)
{
}
PrisonersDetails()
{}
void print()
{
cout << "\t\t__Prisoner Data__" << endl;
cout << "\n\n";
cout << "Name\t Crime\t\t\t ID\t\t\t Cellno\t Age\t Duration\t Date of Entry\n";
cout << "-----------------------------------------------------------------------";
cout << endl;
}
void print(int )
{
cout << name << "\t" << crime << "\t\t\t"<<ID<<"\t\t" << cellno << "\t" << age << "\t" << duration << "\t" << dateofentry;
cout << endl;
}
int getcellno()
{
return cellno;
}
string getID()
{
return ID;
}
};
template<typename T>bool search(T pf[], int n)
{
bool found = false;
string idsearch;
cout << "Enter the ID for Searching Prisoners: ";
cin >> idsearch;
for (int i = 0; i < n; i++)
{
if (pf[i].getID() == idsearch)
{
found = true;
pf[i].print();
pf[i].print(1);
break;
}
}
// cout << "\t\t\tPrisoner Not Found!"<<endl;
return false;
}
class ReleasePrisoners : private PrisonersDetails
{
string priID;
public:
ReleasePrisoners(){}
void releasePrisoner(int n, PrisonersDetails p[])
{
cout << "Enter the ID of Prisoner: ";
cin >> priID;
for (int i = 0; i < n; i++)
{
if (priID == p[i].getID())
{
for (int j = i; j < n - 1; j++)
{
p[j] = p[j + 1];
}
n--;
cout << "\t\t\tPrisoner released successfully!" << endl;
cout << "\t\t\tNow,";
break;
}
}
if (priID != p[n - 1].ID)
{
cout << "Prisoner with ID :" << priID << " not found!" << endl;
}
}
};
class guards
{
string guardid;
int dutycell;
public:
guards()
{}
guards(string id, int dc)
{
guardid = id;
dutycell = dc;
}
void setdutycell(int dc)
{
dutycell = dc;
}
void display(int)
{
cout << "Guard ID" << "\t\t\t" << "DutyCell" << endl;
cout << "---------------------------------------------------------------" << endl;
}
void display()
{
cout <<"\t\t\t"<<srand << "\t\t\t\t" << dutycell << endl;
}
};
class Attendance
{
string date;
public:
void setdate(string d)
{
date = d;
}
void TakingAttendance(int n,PrisonersDetails p[])
{
char* c;
c = new char[n];
cout << "Prisoner of ID: \t\t\t" << date<<"\t\t" << endl;
cout << "-------------------------------------------------------" << endl;
for (int i = 0; i < n; i++)
{
cout << p[i].getID() << "\t\t\t\t";
cin >> c[i];
}
system("cls");
cout << endl << endl;
cout << "\t\t\t\tAttendance Locked\n\n";
cout << "Prisoner of ID: \t\t\t" << date << "\t\t" << endl;
cout << "-------------------------------------------------------" << endl;
for (int i = 0; i < n; i++)
{
cout << p[i].getID()<<"\t\t\t\t"<<c[i]<<endl;
}
}
};
int n;
void show()
{
string nn = { "Enter Your Choice:\n 1) Print Details \n 2) Release Prisoners \n 3) Guards Dutycells \n 4) Attendance of Prisoners \n 5) Searching \n 6) Logout: " };
cout << "\t\t";
int s = nn.size();
for (int i = 0; i < s; i++)
{
cout << nn[i];
for (int j = 0; j < 10000000; j++)
{
}
}
}
void Login()
{
string username = { "iqrafahad" };
string password = { "ooplab" };
string usernameinput;
string passwordinput;
char ch;
cout << "\n\n\n";
cout << "\t\t\t-------------------------------" << endl;
cout << "\t\t\t\tUsername: ";
cin >> usernameinput;
cout << endl;
cout << "\t\t\t\tPassword: ";
while ((ch = _getch()) != 13) //enter type
{
passwordinput += ch;
cout << '*';
}
cout << "\t\t\t-------------------------------" << endl;
int r = username.compare(usernameinput);
int s = password.compare(passwordinput);
if (r == 0 && s == 0)
{
system("cls");
string nn = { "_Welcome To The Prison Management System_" };
cout << "\t\t";
int s = nn.size();
for (int i = 0; i < s; i++)
{
cout << nn[i];
for (int j = 0; j < 10000000; j++)
{
}
}
cout << endl;
}
else
{
system("cls");
cout << "\t\t\tAccess Denied!";
exit(1);
}
}
int main()
{
int c;
Login();
PrisonersDetails* p;
static int m;
string na[100];
string cr[100];
int cell[100];
int a[100];
int d[100];
string date[100];
string id[100];
int s;
int r;
int x;
while (1)
{
cout << "Enter number of prisoners: ";
cin >> n;
p = new PrisonersDetails[n];
if (n != 0)
{
for (int i = 0; i < n; i++)
{
cout << "Enter the name of Prisoner " << i + 1 << ": ";
cin >> na[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the Crime of Prisoner " << i + 1 << ": ";
cin >> cr[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the ID of Prisoner " << i + 1 << ": ";
cin >> id[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the Cell number of Prisoner " << i + 1 << ": ";
cin >> cell[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the age of Prisoner " << i + 1 << ": ";
cin >> a[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the Duration of Prisoner " << i + 1 << ": ";
cin >> d[i];
}
cout << endl;
for (int i = 0; i < n; i++)
{
cout << "Enter the Date of Entry of Prisoner " << i + 1 << ": ";
cin >> date[i];
}
for (int i = 0; i < n; i++)
{
p[i].setname(na[i]);
p[i].setcrime(cr[i]);
p[i].setid(id[i]);
p[i].setcellno(cell[i]);
p[i].setage(a[i]);
p[i].setduration(d[i]);
p[i].setdateofentry(date[i]);
}
system("cls");
cout << "\n";
cout << "\t\tData Successfully entered into the system!"<<endl;
cout << "\n";
}
for (;;)
{
show();
cin >> x;
switch (x)
{
case 1:
{
PrisonersDetails P1;
system("cls");
P1.print();
for (int i = 0; i < n; i++)
{
p[i].print(2);
}
break;
}
case 2:
{
ReleasePrisoners pr;
pr.releasePrisoner(n, p);
break;
}
case 3:
{
guards* g;
g = new guards[n];
guards g1;
for (int i = 0; i < n; i++)
{
g[i].setdutycell(p[i].getcellno());
}
system("cls");
cout << endl << endl;
cout << "\t\t\t";
g1.display(2);
for (int i = 0; i < n; i++)
{
g[i].display();
}
break;
}
case 4:
{
Attendance a1;
string d;
cout << "Enter the date for Attendance: ";
cin >> d;
a1.setdate(d);
a1.TakingAttendance(n, p);
break;
}
case 5:
{
system("cls");
search(p, n);
break;
}
case 6:
{
string nn = { " loading-------" };
int s = nn.size();
system("cls");
cout << "\n\n\n";
cout << "\t\t\t\t";
for (int i = 0; i < s; i++)
{
cout << nn[i];
for (int j = 0; j < 100000000; j++)
{
}
}
system("cls");
cout << endl << "\n\n\t\t\t\tLOGGEDOUT" << endl;
exit(1);
}
default:
break;
}
cout << "Press 1 to continue ";
cin >> c;
if (c != 1)
{
break;
}
}
}
}
Explanation
In the above C++ program, we try to use as many concepts of Oop programming as we can. The above C++ example code is about the Prison Management System, It has the capability to Take the Prisoners' Data, Taking Attendance, for searching Prisoners we use a generic function (As we know for algorithms generic is best used), This program has also able to generate automatic guards with automatic id assigning system to each cell(all this happens because of guard class). Here is also a Login system to excess this program(using a global function).
Username: iqrafahad
Password: ooplab
Use the above-mentioned username and password to excess this program.
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