CSI 250L Lab 4 Solution, Spring 2012

American University of Science & Technology Department Of Computer Science CSI 250L – Computer Programming-II Lab Spring 2011/2012 Lab Work 4 Solution provided by : Dr. Saeed Raheel Write the class definitions and implementations for the following class specifications. Use separate files for the definition and implementation. Publisher Attributes  ID: a number to identify each publisher.  Name: a string of characters. ( dynamic allocation)  Location: a string of 50 characters.  Type: an integer to specify the type of the publisher, the type can be 1, 2 or 3. Methods  Constructor(default values)  Print: a function, to print the information about a publisher in the following format: ID = 111, Name = Print_Shop, Location = Lebanon, Type = 1.  Destructor.  Set and get functions. Write a c++ program to store data about N publishers. The program should do the following:  Output the information about all publishers of type 1.  Display a sorted list of publisher according to the location.  Change the location “Beirut” to “Saida”.  Display the information about a publisher knowing his ID. 1 //publisher.h #ifndef PUBLISHER_H #define PUBLISHER_H class Publisher { private: int ID; char *Name; char Location[50]; int Type; public: Publisher(int=0, char* ="", char[]="", int=0); ~Publisher(); void setID(int); void setName(char *); void setLocation(char *); void setType(int); int getID(); char * getName(); char * getLocation(); int getType(); void print(); }; #endif //publisher.cpp #include "Publisher.h" #include <iostream> using namespace std; Publisher::Publisher(int id, char * n, char l[], int t) { ID = id; Name = new char[strlen(n)+1]; strcpy(Name, n); strcpy(Location, l); Type = t; } Publisher::~Publisher() { ID = NULL; delete[] Name; delete[] Location; Type = NULL; } void Publisher::setID(int id) { ID = id; } void Publisher::setName(char*n) 2 { Name = new char[strlen(n)+1]; strcpy(Name, n); } void Publisher::setLocation(char l[]) { strcpy(Location, l); } void Publisher::setType(int t) { Type = t; } int Publisher::getID() { return ID; } char *Publisher::getName() { return Name; } char *Publisher::getLocation() { return Location; } int Publisher::getType() { return Type; } void Publisher::print() { cout << "ID = " << ID << ", Name = " << Name << ", Location = " << Location << ", Type = " << Type << endl; } 3 //Driver #include "Publisher.h" #include <iostream> using namespace std; int main() { int n; cout << "How many publisher(s) would you like to create?"; cin >> n; Publisher *pubs = new Publisher[n]; int id; char pubname[100]; char publocation[100]; int pubtype; for (int i=0;i<n;i++) { cout << "Enter publisher's ID:"; cin >> id; cout << "Enter publisher's name:"; cin >> pubname; cout << "Enter publisher's location:"; cin >> publocation; cout << "Enter publisher's type:"; cin >> pubtype; pubs[i].setID(id); pubs[i].setName(pubname); pubs[i].setLocation(publocation); pubs[i].setType(pubtype); } cout << "Printing information about publishers whose type = 1" << endl; for (int i=0;i<n;++i) if (pubs[i].getType() == 1) pubs[i].print(); cout << endl; Publisher temppub; for (int i=0;i<n;++i) for (int j=0;j<n;++j) if (strcmp(pubs[j].getLocation(), pubs[j+1].getLocation())>0) { temppub = pubs[j]; pubs[j] = pubs[j+1]; pubs[j+1] = temppub; } cout << "After sorting by location : "<< endl; for (int i=0;i<n;++i) 4 pubs[i].print(); cout << endl; cout << "Changing location Beirut to Saida : " << endl; for (int i=0;i<n;++i) if (strcmp(pubs[i].getLocation(), "Beirut")==0) pubs[i].setLocation("Saida"); cout << "After changing the location : "<< endl; for (int i=0;i<n;++i) pubs[i].print(); cout << endl; cout << "Please enter the ID of the publisher to prints its information : "; cin >> id; for (int i=0;i<n;++i) if (pubs[i].getID() == id) pubs[i].print(); cout << endl; system("pause"); return 0; } 5