turboc++

librarymanagement.cpp

#include<iostream.h>
#include<conio.h>

int a = 2, b = 3, c = 4, i = 0;
//Define class
class lib {
  int n;
  public:

    void issue();
  void show();
  void ret();
};

void lib::issue() {
  cout << "enter code:";
  cin >> n;

  switch (n) {
  case 101:
    if (a != i) {
      a--;
      cout << "NCERT mano is issued\nno. of books=" << a << "\n\n";

    }
    break;
  case 102:
    if (b != i) {
      b--;
      cout << "peter syckes is issued\n no. of book=" << b << "\n\n";

    }
    break;
  case 103:
    if (c != i) {
      c--;
      cout << "ncert maths is issued\n no. of book=" << c << "\n\n";

    }
    break;
  }
}
void lib::ret() {
  cout << "enter code to return the book:";
  cin >> n;

  switch (n) {
  case 101:
    if (a != 2) {
      a++;
      cout << "NCERT mano is returned\nno. of books=" << a;

    }
    break;
  case 102:
    if (b != 3) {
      b++;
      cout << "peter syckes is returned\n no. of book=" << b;

    }
    break;
  case 103:
    if (c != 4) {
      c++;
      cout << "NCERT maths is returned\n no. of book=" << c;

    }
    break;
  }
}

void lib::show() {
  cout << "book code:101\n";
  cout << "name: NCERT mano\n";
  cout << "availability:" << a << "\n\n";
  cout << "book code:102\n";
  cout << "name: peter sykes\n";
  cout << "availability:" << b << "\n\n";
  cout << "book code:103\n";
  cout << "name: NCERT maths\n";
  cout << "availability:" << c << "\n\n";
}
void main() {
  class lib lb;
  int k, m;
  clrscr();
  x:
    cout << "enter 1 to see the list of books\n";
  cout << "enter 2 to issue the book\n";
  cout << "enter 3 to return the book\n";
  cout << "number:";
  cin >> k;
  switch (k) {
  case 1:
    lb.show();
    cout << "\nenter 0 to go to previous:";
    cin >> m;
    if (m == 0)
      goto x;
    else
      break;
  case 2:
    lb.issue();
    cout << "\nenter 0 to go to previous:";
    cin >> m;
    if (m == 0)
      goto x;
    else
      break;
  case 3:
    lb.ret();
    cout << "\nenter 0 to go to previous:";
    cin >> m;
    if (m == 0)
      goto x;
    else
      break;
  }
  getch();
}