Dec 21, 2012 at 3:21am UTC
So i have this code for an exercise about a Delivery company that delivers packages. Each package has its different characteristics and its separated in 3 categories, the basic, the advanced, and the overnight.
The question is how can i access the member functions, like calculateDate, of any class when the object is created in the vector. I have beed trying using an iterator but it comes up with an error...
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#include <cstdlib>
#include <vector>
#include <iostream>
#include <ctime>
#include <string>
#define a 5
#define f 2
#define b 10
using namespace std;
class Date
{
private :
int day, month, year;
public :
Date();
void display_date ();
Date operator + (int x);
};
class Package
{
protected :
float weight;
string namesend;
string namerec;
string addrec;
Date date;
public :
Package();
virtual float calculateCost();
virtual void calculateDate ();
virtual void displayPackage ();
void set_weight (float wei);
float get_weight();
void set_namesend (string name);
string get_namesend ();
void set_namerec (string rec);
string get_namerec ();
void set_addrec (string addrec);
string get_addrec ();
};
class Advanced_Package:public Package
{
public :
Advanced_Package();
float calculateCost();
void calculateDate();
void displayPackage ();
};
class Overnight_Package:public Package
{
public :
Overnight_Package();
float calculateCost();
void calculateDate();
void displayPackage ();
};
Date::Date()
{
time_t rawtime;
struct tm* timeinfo;
time(&rawtime);
timeinfo=localtime(&rawtime);
day=timeinfo->tm_mday;
month=timeinfo->tm_mon + 1;
year=timeinfo->tm_year + 1900;
}
void Date::display_date()
{
cout << day << "/" << month << "/" << year << endl;
}
Date Date::operator +(int x)
{
Date temp;
temp.day=temp.day+x;
if (temp.month%2==0)
{
if (temp.day>31)
{
temp.day=temp.day-31;
temp.month++;
if (temp.month>12)
{
temp.year++;
temp.month=temp.month-12;
}
}
}
else
{
if (temp.day>30)
{
temp.day=temp.day-30;
temp.month++;
if (temp.month>12)
{
temp.year++;
temp.month=temp.month-12;
}
}
}
return temp;
}
Package::Package()
{
weight=0;
namesend="unknown" ;
namerec="unknown" ;
addrec="unknown" ;
}
void Package::set_weight (float wei)
{
weight=wei;
}
float Package::get_weight()
{
return weight;
}
void Package::set_namesend (string name)
{
namesend=name;
}
string Package::get_namesend ()
{
return namesend;
}
void Package::set_namerec (string rec)
{
namerec=rec;
}
string Package::get_namerec ()
{
return namerec;
}
void Package::set_addrec (string adrec)
{
addrec=adrec;
}
string Package::get_addrec ()
{
return addrec;
}
void Package::calculateDate()
{
date=date+5;
}
void Package::displayPackage()
{
cout << weight << " " << namesend << " " << namerec << " " << addrec << "\nyou have picked Basic package delivery" << endl;
cout << "ETOD: " ;
date.display_date();
cout << endl;
}
float Package::calculateCost()
{
return a*(weight);
}
Advanced_Package::Advanced_Package()
{
weight=0;
namesend="unknown" ;
namerec="unknown" ;
addrec="unknown" ;
}
float Advanced_Package::calculateCost()
{
return f+a*(weight);
}
void Advanced_Package::calculateDate()
{
date=date+2;
}
void Advanced_Package::displayPackage()
{
cout << weight << " " << namesend << " " << namerec << " " << addrec << "\nyou have picked Advanced package delivery" << endl;
cout << "ETOD: " ;
date.display_date();
cout << endl;
}
Overnight_Package::Overnight_Package()
{
weight=0;
namesend="unknown" ;
namerec="unknown" ;
addrec="unknown" ;
}
float Overnight_Package::calculateCost()
{
return (b+a)*(weight);
}
void Overnight_Package::calculateDate()
{
date=date+1;
}
void Overnight_Package::displayPackage()
{
cout << weight << " " << namesend << " " << namerec << " " << addrec << "\nyou have picked Overnight package delivery" << endl;
cout << "ETOD: " ;
date.display_date();
cout << endl;
}
i have been trying using this, but the program ends when it gets to the line after the creation of the object
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vector<Package*> packages;
string str;
float num;
int option;
vector<Package*>::iterator it=packages.begin();
vector<Package*>::iterator at;
do {
cout << "-----------Menu-----------------------" << endl;
cout << "|Type 1 to send a Basic package |" << endl;
cout << "|Type 2 to send an Advanced package |" << endl;
cout << "|Type 3 to send an Overnight package |" << endl;
cout << "|Type 4 to view all pending packages |" << endl;
cout << "|Type 0 to exit |" << endl;
cout << "--------------------------------------" << endl;
cin >> option;
cin.ignore();
if (option==1)
{
packages.push_back(new Package());
(*it)->calculateDate();
cout << "insert your name" << endl;
getline(cin, str);
(*it)->set_namesend(str);
cout << "insert receivers name" << endl;
getline(cin, str);
(*it)->set_namerec(str);
cout << "insert receiver's address" << endl;
getline(cin, str);
(*it)->set_addrec(str);
cout << "insert the weight of the package" << endl;
cin >> num;
cin.ignore();
(*it)->set_weight(num);
++it;
}
else if (option==2)
{
packages.push_back(new Advanced_Package());
(*it)->calculateDate();
cout << "insert your name" << endl;
getline(cin, str);
(*it)->set_namesend(str);
cout << "insert receivers name" << endl;
getline(cin, str);
(*it)->set_namerec(str);
cout << "insert receiver's address" << endl;
getline(cin, str);
(*it)->set_addrec(str);
cout << "insert the weight of the package" << endl;
cin >> num;
cin.ignore();
(*it)->set_weight(num);
++it;
}
else if (option==3)
{
packages.push_back(new Overnight_Package());
(*it)->calculateDate();
cout << "insert your name" << endl;
getline(cin, str);
(*it)->set_namesend(str);
cout << "insert receivers name" << endl;
getline(cin, str);
(*it)->set_namerec(str);
cout << "insert receiver's address" << endl;
getline(cin, str);
(*it)->set_addrec(str);
cout << "insert the weight of the package" << endl;
cin >> num;
cin.ignore();
(*it)->set_weight(num);
++it;
}
else if (option==4)
{
for (at = packages.begin(); at!=packages.end(); ++at)
{
(*at)->displayPackage();
}
}
}
while (option!=0);
Last edited on Dec 21, 2012 at 3:22am UTC
Dec 21, 2012 at 3:28am UTC
ohh nevermind i figured it out...
i had been initializing the iterator, before the vector had any objects, instead of initializing it inside every <if>
any other suggestions are welcome :D
Last edited on Dec 21, 2012 at 3:28am UTC