I receive to build areas when I want to start my debugging. But the errors do not show up when i just compile.

They are:
error LNK2001: unresolved external symbol "void __cdecl withdraw(char,double &,double &,class std::basic_ifstream<char,struct std::char_traits<char> > &,struct node * &)" (?withdraw@@$$FYAXDAAN0AAV?$basic_ifstream@DU?$char_traits@D@std@@@std@@AAPAUnode@@@Z)

and

fatal error LNK1120: 1 unresolved externals.

Does anyone know what they mean?
By the way, I am using Microsoft Visual C++ as my compiler.

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <iomanip>
#include <cstring>
using namespace std;

struct node
{
	int acctno;			//customer account number
	char pwd[4];			// customer password
	double ckbal;		// check balance
	double svbal;		// savings balance
	node *next;
};

void loadfile(node *&);			//load link list
void get_info(node *);			// find account and password
char menu();					// display menu and get choice
char accounttype();				// display menu for what type of account to access
node * search_acctno(node *, int);	// search for account
void balance(char &type, double ckbal, double svbal, ifstream &, node *&); //displays balance
void deposit(char type, double &ckbal, double &svbal, ifstream &fin, node *&); //deposit funds
void withdraw(char type, double &ckbal, double &svbal, ifstream &fin, node *&);	//withdraw funds
void transfer(char type, double &ckbal, double &svbal, ifstream &fin, node *&); //transfer funds

int main()
{
	cout.setf(ios::fixed);
	cout.setf(ios::showpoint);
	cout.precision(2);

	node *beg;						// pointer to 1st node in list
	node *curr;
	char choice, type;				// menu choice
	double ckbal, svbal;
	ifstream fin;

	loadfile(beg);
	get_info(beg);
	

	do
	{
		choice = menu();
		switch(choice)
		{
			case 'I':
				system ("cls");  //clear screen
				accounttype();
				balance(type, ckbal, svbal, fin, curr);
				break;
			case 'D':
				system ("cls"); //clear screen
				accounttype();
				deposit(type, ckbal, svbal, fin, curr);
				break;
			case 'W':
				system ("cls");
				accounttype();
				withdraw(type, ckbal, svbal, fin, curr);
				break;
			case 'T':
				system ("cls");
				accounttype();
				transfer(type, ckbal, svbal, fin, curr);
				break;
			case 'X':
				cout << "Thank you for using the First Stealing and Loan ATM Program.\n";
				cout << "Come back soon." << endl;
				break;
		}
	}while (choice != 'X');

	return 0;
}			
void loadfile(node *&beg)
{
	node *end, *curr;

	ifstream fin ("a:\\cust.doc", ios::in);

	beg = new node;        //dynamically allocate beginning node

	if(!fin.is_open())
	{
		cerr << "Error: Could not open file.\n";		// file not opened
		exit(1);
	}
	fin >> beg->acctno;
	fin >> beg->pwd;
	fin >> beg->ckbal;
	fin >> beg->svbal;
	beg->next = NULL;
	end = beg;

	while(!fin.eof())
	{
		curr = new node;
		fin >> curr->acctno;
		fin >> curr->pwd;
		fin >> curr->ckbal;
		fin >> curr->svbal;
		curr->next = NULL;
	}

	return;
}


void get_info(node *beg)
{
	int acctno;
	char pwd[4];

	cout << "Please enter account number: ";		// get account number
	cin >> acctno;
	cout << endl;

	if(acctno != NULL)
	{
		search_acctno(beg, acctno);		//search for account

		cout << "Please enter password: ";		// get password	
		
		if(pwd != NULL)
		{
			cin >> pwd;
			cout << endl;
		}
		else
		{
			cout << "Not found" << endl;
		}
	}
	else
	{
		cout << "Not found" << endl;
	}
	return;
}
char menu()
{
	char choice;

	system ("cls");					// clear screen
	cout << endl
		 << "Enter I for Balance inquiry.\n"
		 << "Enter D for Deposit funds.\n"
		 << "Enter W for Withdraw funds.\n"
		 << "Enter T for Transfer funds.\n"
		 << "Enter X to Exit.\n"
		 << "Enter choice and press Enter: ";
	cin >> choice;

	return choice;
}
char accounttype()
{
	char type;

	system ("cls");					// clear screen
	cout << endl
		 << "Enter C for Checking.\n"
		 << "Enter S for Savings.\n"
		 << "Enter R to Return to Main Menu.\n"
		 << "Enter type and press Enter: ";
	cin >> type;

	do
	{
		switch(type)
		{
			case 'C':
				system ("cls");
				break;
			case 'S':
				system ("cls");
				break;
			case 'R':
				menu();
				break;
		}
	}while(type != 'R');
	
	return type;
}
node * search_acctno(node *beg, int acctno)
{
	node *curr = beg;
	if(curr == NULL)
	{
		return NULL;				//list empty
	}
	while(curr->acctno != acctno && curr->next != NULL)
	{
		curr = curr->next;
	}
	if(curr->acctno == acctno)
	{
		return curr;				//return pointer to node
	}
	else
	{
		return NULL;				// account not found
	}
}

void balance(char &type, double ckbal, double svbal, ifstream &fin, node *&curr)
{

    // Displays current balance on the screen
    system("cls");

	if (type == 'C')
	{
		fin >> curr->ckbal;
        cout << "Checking Balance is: $"<< ckbal << endl;
	}
	else
	{
		fin >> curr->svbal;
        cout << "Savings Balance is: $"<< svbal << endl;
	}
	return;
}
void deposit(char type, double &ckbal, double &svbal, ifstream &fin, node *&curr)	// Processes a deposit
{
    double amount;      // Amount of deposit - assumes amount > 0

    // Clear screen and get deposit amount
    system("cls");
	if (type == 'C')
	{
		fin >> curr->ckbal;
		cout <<	"Amount of deposit?: ";
		cin >> amount;
		ckbal += amount;
        cout << "Checking Balance is: $"<<ckbal<<endl;
	}
	else
	{
		fin >> curr->svbal;
		cout <<	"Amount of deposit?: ";
		cin >> amount;
		svbal += amount;
        cout << "Savings Balance is: $"<<svbal<<endl;
	}
	return;
}

void withdraw(char type, double &ckbal, double &svbal, ifstream &fin, node *curr)	// Processes a withdrawal
{
	 double amount;          // Amount of withdrawal - assumes amount > 0

    // Clear screen and get withdrawal amount
    system("cls");

	if (type == 'C')
	{
		fin >> curr->ckbal;
        cout << "Processing a Withdrawal\n";
        cout << "Amount of withdrawal? ";
		cin>>amount;
		if(amount > ckbal)
		{
			cout << "Insuffienct funds!"<< endl;
		}
		else
		{
			cout << "Withdrawal amount? ";
			cin >> amount;
			ckbal -= amount;
			cout << "Your checking balance is now $"<< ckbal << endl;
		}
	}
	else
	{
		fin >> curr->svbal;
		cout << "Processing a Withdrawal\n";
        cout << "Amount of withdrawal? ";
		cin >> amount;
		if(amount > svbal)
		{
			cout << "Insuffienct funds!"<< endl;
		}
		else
		{
			cout << "Withdrawal amount? ";
			cin >> amount;
			svbal -= amount;
			cout << "Your savings balance is now $"<< svbal << endl;
		}
	}
	return;
}
void transfer(char type, double &ckbal, double &svbal, ifstream &fin, node *&curr)
{	
	double amount;			//Amount of transfer - assumes amount > 0

	system("cls");

	if (type == 'C')
	{
		fin >> curr->ckbal;
		cout << "Processing a Transfer\n";
        cout << "Amount of transfer? ";
		cin >> amount;

		if(amount > ckbal)
		{
			cout << "Insuffienct funds!"<< endl;
		}
		else
		{
			ckbal -= amount;
			cout <<	"Your checking balance is now $"<< ckbal << endl;
			svbal += (ckbal - amount);
			cout <<	"Your savings balance is now $"<< svbal << endl;
		}
	}
	else
	{
		fin >> curr->svbal;
		cout << "Processing a Transfer\n";
        cout << "Amount of transfer? ";
		cin >> amount;

		if(amount > svbal)
		{
			cout << "Insuffienct funds!"<< endl;
		}
		else
		{
			svbal -= amount;
			cout <<	"Your savings balance is now $"<< svbal << endl;
			ckbal += (svbal - amount);
			cout <<	"Your checking balance is now $"<< ckbal << endl;
		}
	}
	return;
}

That means it can't find where you defined your function
change this

void withdraw(char type, double &ckbal, double &svbal, ifstream &fin, node *curr)

to this

void withdraw(char type, double &ckbal, double &svbal, ifstream &fin, node *&curr)

Another question? When the command prompt comes up, it is suppose to load the file but it is just blank, what exactly did i code incorrectly? I still trying to figure it out.

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