My Program is compiling, but it wont stop running. Can you please help me?

[Tigerlily]

// Program to create new accounts, perform deposits, withdrawals, and bank
//inquiries
#include<iostream>
#include<fstream>
using namespace std;
void menu();
int read_accts(int [], double [], int);
void withdrawal(int [], double [], int);
void deposit(int [], double [], int);
int new_acct(int [], double [], int);
void balance(int [], double[], int);
int main()
{
char answer;
int a, num_elems, max_elems;
int acctnum[6] = {123456,781912,238427,581493,941357,842364};
double balance[6] = {500000,100,65400,500,1000,20};

max_elems = read_accts (acctnum, balance, 100);
num_elems = read_accts (acctnum, balance, 100);

while (num_elems <=6){
read_accts(acctnum, balance, max_elems);
if (answer == 'W') withdrawal(acctnum, balance, num_elems);
if (answer == 'D') deposit(acctnum, balance, num_elems);
}

do {
menu();
cout << "Which banking transaction would you like to use? Enter Q to quit";
cout << " the transaction " << endl;
cin >> answer;

}while ((answer != 'Q') && (answer != 'q'));

system ("pause");
return 0;

}

// Function: read_accts
// Input:
// account numbers and their current balances
// Process:
// reads in the account number and its balance
// Output:
// prints the account number and its balance

//Function to read in the account numbers and their balances
int read_accts (int acctnumarray [], double balancearray [], int maxelems)
{
int a, elemcount = 0;
double balance;
for (a = 0; a <=6; a++){

// declare and open input file
// fstream infile("c:\\Dev-Cpp\\bankproginput.txt");
// ifstream infile(“con”); //un-comment for debugging

cout << "The account number is " << acctnumarray[a];
cout << "and its balance is " << balancearray[a] << endl;

}

return elemcount;


}

// Function: menu
// Input:
// none
// Process:
// creates a menu for the user
// Output:
// A menu is printed

// Function to print the menu
void menu()
{
cout << " Menu of Transactions" << endl;
cout << " W = withdrawal" << endl;
cout << " D = deposit" << endl;
cout << " N = new account" << endl;
cout << " B = balance" << endl;
cout << " Q = quit" << endl;
return;
}

// Function: Withdrawal
// Input:
// none
// Process:
// determines amount of money that the user wants to take out
// Output:
// the amount of money to be withdrawn

// Function to make a withdrawal
void withdrawal (int acctnumarray [], double balancearray [], int numelems)
{
int with = 0;
int acctnum, a;

cout << "Enter your account number: - end with EOF" << endl;
cin >> acctnum;
for (a = 0; a <= numelems; a++);
if (acctnum == acctnumarray[a])
{
cout << "How much money would you like to withdraw?" << endl;
cin >> with;
}
else if (acctnum != acctnumarray[a])
{
cout << "This is an invalid account number." << endl;
}

if (with <= balancearray[a])
{
cout << "Your account does not have a sufficient amounts of funds";
cout << "to proceed with this transaction." << endl;
}

return;
}

// Function: Deposit
// Input:
// none
// Process:
// determines amount of money that the user wants to take out
// Output:
// the amount of money to be withdrawn

//Function to make a deposit
void deposit (int acctnumarray [], double balancearray [], int numelems)
{
int dep = 0;
int acctnum, a;

cout << "Enter your account number:" << endl;
cin >> acctnum;
for (a = 0; a <= numelems; a++);{
cout << "How much money would you like to deposit?" << endl;
cin >> dep;
if (acctnum != acctnumarray[a]);
cout << "This account does not exist." << endl;

}
return;
}

// Function: balance
// Input:
// none
// Process:
// determines amount of money that the user has left in their account
// Output:
// the amount of money to be withdrawn

//Function to tell you how much money is in your account
//void balance (int acctnumarray [], double balancearray [], int numelems)
//{
//}

[MariyaGel]

Im not exactly sure if this is what you wanted since im new at this but i got the program to stop being in an endless loop and you can fix up the rest from here.

Here it is:

#include<iostream>
#include<fstream>
using namespace std;
void menu();
int read_accts(int [], double [], int);
void withdrawal(int [], double [], int);
void deposit(int [], double [], int);
int new_acct(int [], double [], int);
void balance(int [], double[], int);
int main()
{
char answer;
int a, num_elems, max_elems;
int acctnum[6] = {123456,781912,238427,581493,941357,842364};
double balance[6] = {500000,100,65400,500,1000,20};

max_elems = read_accts (acctnum, balance, 100);
num_elems = read_accts (acctnum, balance, 100);

do {
menu();
cout << "Which banking transaction would you like to use? Enter Q to quit";
cout << " the transaction " << endl;
cin >> answer;
if (answer == 'W') withdrawal(acctnum, balance, num_elems);
if (answer == 'D') deposit(acctnum, balance, num_elems);

}while ((answer != 'Q') && (answer != 'q'));

system ("pause");
return 0;

}

// Function: read_accts
// Input:
// account numbers and their current balances
// Process:
// reads in the account number and its balance
// Output:
// prints the account number and its balance

//Function to read in the account numbers and their balances
int read_accts (int acctnumarray [], double balancearray [], int maxelems)
{
int a, elemcount = 0;
double balance;
for (a = 0; a <=6; a++){

// declare and open input file
// fstream infile("c:\\Dev-Cpp\\bankproginput.txt");
// ifstream infile(“con”); //un-comment for debugging

cout << "The account number is " << acctnumarray[a];
cout << "and its balance is " << balancearray[a] << endl;

}

return elemcount;


}

// Function: menu
// Input:
// none
// Process:
// creates a menu for the user
// Output:
// A menu is printed

// Function to print the menu
void menu()
{
cout << " Menu of Transactions" << endl;
cout << " W = withdrawal" << endl;
cout << " D = deposit" << endl;
cout << " N = new account" << endl;
cout << " B = balance" << endl;
cout << " Q = quit" << endl;
return;
}

// Function: Withdrawal
// Input:
// none
// Process:
// determines amount of money that the user wants to take out
// Output:
// the amount of money to be withdrawn

// Function to make a withdrawal
void withdrawal (int acctnumarray [], double balancearray [], int numelems)
{
int with = 0;
int acctnum, a;

cout << "Enter your account number: - end with EOF" << endl;
cin >> acctnum;
for (a = 0; a <= numelems; a++);
if (acctnum == acctnumarray[a])
{
cout << "How much money would you like to withdraw?" << endl;
cin >> with;
}
else if (acctnum != acctnumarray[a])
{
cout << "This is an invalid account number." << endl;
}

if (with <= balancearray[a])
{
cout << "Your account does not have a sufficient amounts of funds";
cout << "to proceed with this transaction." << endl;
}

return;
}

// Function: Deposit
// Input:
// none
// Process:
// determines amount of money that the user wants to take out
// Output:
// the amount of money to be withdrawn

//Function to make a deposit
void deposit (int acctnumarray [], double balancearray [], int numelems)
{
int dep = 0;
int acctnum, a;

cout << "Enter your account number:" << endl;
cin >> acctnum;
for (a = 0; a <= numelems; a++);{
cout << "How much money would you like to deposit?" << endl;
cin >> dep;
if (acctnum != acctnumarray[a]);
cout << "This account does not exist." << endl;

}
return;
}

// Function: balance
// Input:
// none
// Process:
// determines amount of money that the user has left in their account
// Output:
// the amount of money to be withdrawn

//Function to tell you how much money is in your account
//void balance (int acctnumarray [], double balancearray [], int numelems)
//{
//}