searching and deleting

[computerscienceguy]

hi guys,

basically i am making a bank account program for an assignment, and now i have encountered a problem i cannot get my head round. Basically i have created a Customer vector and i am creating instances of Customer calling the constructor.

Customer *cust1 = new Customer(param,param,etc);

and then using the push_back funciton to add it to the vector. My system should be able to delete a customer and this is what i am kind of stuck on.

Note: I created a vector called custVec.

cout << "Enter customer name: " << endl;
cin >> custName;
int iCust;
bool custFound = false;
for(iCust = 0; iCust < custVec.size(); iCust++)
{
if(custName == custVec[iCust]->getLastName())
{
custFound = true;
//delete customer here
break;
}
}
if(custFound == false)
{
cout << "A customer with this name was not found. Please add customer to the system first." << endl << endl;
}

As you can see. I have created a string variable where the user enters the customer surname and a for loop which loops through the vector. If the surname string matches the name found in the vector, i want it to delete the customer. Now i guess that I would probably need to create a Customer pointer and then use the delete keyword to delete the customer.

Can somebody please tell me how to do this. It would be most appreciated. Many thanks!

[bujiwu]

I think you shoud use iterator.

#include <vector>
#include <string>
#include <iostream>

using namespace std;

class CCustomer
{
public:
	CCustomer(string name)
	{
		this->name =name;
	}
	string getLastName() const
	{
		return name;
	}
private:
	string name;
};

int main(int i, char* argv[])
{ 
	vector<CCustomer> custVec;
	CCustomer   customer1("Bujiwu");
	CCustomer   customer2("Swallow");

	custVec.push_back(customer1);
	custVec.push_back(customer2);

	string custName;
	cout << "Enter customer name: " << endl;
	cin >> custName;

	vector<CCustomer>::iterator Itor;
	bool custFound = false;
	for( Itor=custVec.begin(); Itor!=custVec.end(); Itor++)
	{
		if( custName ==Itor->getLastName() )
		{
			custFound = true;
                        custVec.erase(Itor);
			break;
		}
	}

	if(custFound == false)
	{
		cout << "A customer with this name was not found. Please add customer to the system first." << endl << endl;
	}
    
	return 0;
} 

[helios]

This is probably what you need:

delete custVec[iCust];
custVec[iCust]=0; //or NULL, if you're into that sort of thing 

Note that this will leave empty spots in the vector, and that you will need to check that custVec[iCust]!=NULL before deferencing or you'll get a segmentation fault.
The good part is that you will save some time by not displacing the range [iCust+1;n-1], which can be a real time-saver in the long run.

[gen1mx6]

http://www.cplusplus.com/reference/stl/vector/

Check this out so you can remove from the vector easier.

[seymore15074]

After deleting the object, you could use vector's erase method to remove it from the vector.

[computerscienceguy]

ok guys. thank you all for your speedy replies :D