Phone number program

[Mdogg2005]

Hey there guys, I'm doing a program that can read multiple phone numbers and output the numbers or error codes based on what's put in.

Specifics:
Write a program that simulates the dial of a phone number. The program will input a phone number and the program will acknowledge the call by either writing an error message or the 8 digit phone number to the console window. The phone number may have either digits, letters, or both.

Define a function named ReadDials() that reads each digit/letter dialed into 8 separate char variables (DO NOT USE ARRAYS). All digits are sent back through parameters by reference. Then, for each digit, the program will use a function named ToDigit(), which receives a single char argument (pass by reference) that may be a number or a letter of one of the digits dialed. If it is a number, return 0 by value indicating it is a valid digit. If the digit is a letter, the number corresponding to the letter is returned by reference and return 0 by value indicating it is a valid digit. Here are the letters associated with each digit.

0 5 J K L
1 6 M N O
2 A B C 7 P Q R S
3 D E F 8 T U V
4 G H I 9 W X Y Z

If the digit entered is not one of the valid digits or valid letters, return –1 by value indicating that you have an invalid digit.

A phone number never begins with a 0, so the program should flag an error if such a number is entered. Make ReadDials() return –2 in this case. Also a phone number never begins with 555, so the program should flag an error if such a number is entered. Make ReadDials() return –3 in this case. A phone number always has a hyphen (-) in the 4th position. Make ReadDials() return –4 if it doesn't have a hyphen in the 4th position. If a hyphen is in any other position, it is considered an invalid digit. If the phone number is valid, main calls the AcknowledgeCall function to write the converted number to the output file.

All the logic of the program should be put in functions that are called from Main(): ReadDials(), and AcknowledgeCall(). The ToDigits() function is called from the ReadDials() function and is used to convert each letter entered individually to a digit and to verify the user has entered a valid phone number. Have the program work for any number of phone numbers. Continue processing until the user enters a Q.

In the ToDigits() function use the toupper function to convert any letters entered to uppercase. All error messages are to be written to the output file from main() based on the return value from the functions.

You will set up the 8 char variables to hold the digits of the phone number in main() and pass the variables to the functions by reference.

Sample Output from the Program:

Enter a phone number (Q to quit): 213-2121
Phone Number Dialed: 213-2121

Enter a phone number (Q to quit): asc-dfer
Phone Number Dialed: 272-3337

Enter a phone number (Q to quit): 555-resw
ERROR - Phone number cannot begin with 555

Enter a phone number (Q to quit): 098-8765
ERROR - Phone number cannot begin with 0

Enter a phone number (Q to quit): 12345678
ERROR - Hyphen is not in the correct position

Enter a phone number (Q to quit): @34-*uyt
ERROR - An invalid character was entered

Enter a phone number (Q to quit): Q
Press any key to continue . . .


Pseudo

Main Function
Declare the char variables for the 8 digits of the phone number
while true
Call the ReadDials function passing the 8 digits
by reference. ReadDials returns an error code by
value.
If the return value is -5, exit the do while loop
If the error code is -1, display the
error message "ERROR - An invalid character was entered".
If the error code is -2, display the
error message "ERROR - Phone number cannot begin with 0".
If the error code is -3, display the
error message "ERROR - Phone number cannot begin with 555".
If the error code is -4, display the
error message "ERROR - Hyphen is not in the correct position".
Otherwise, call the AcknowledgeCall function
End-While
ReadDials function
Input the first digit
If a Q was entered, return -5.
Input the rest of the phone number
Call the ToDigit function for each of the 7 digits
not for digit 4
If ToDigit returns -1, return -1
If digit 4 is not a hyphen, return -4.
If digit 1 is 0, return -2.
If digits 1 - 3 are 5, return -3
Otherwise, return 0
ToDigit function
Convert the digit to upper case
Use a switch statement to determine if the digit is valid
and convert the letters to digits
If the digit is invalid, return -1.
If the digit is valid, return 0.
AcknowledgeCall function
Display the Phone Number.


Now here is my code:

#include <iostream>
#include <string>
#include <cctype>
#include <iomanip>
using namespace std;

char readDials(int, char);
int toDigit(char &d);
int acknowledgeCall();

int main()
 {
	 char num1, num2, num3, num4, num5, num6, num7, num8;


}

char readDials(int number, char)
{
	number;
	cout << "Enter phone number (or Q to quit): ";
	cin >> number;
	if (number == 'Q')
		return -5;

}

int toDigit()
{

}

int acknowledgeCall()
{
	cout << "The phone number dialed: " << 
}

I'm genuinely lost on where to go from here and my reading material isn't sinking in like it should.. Any help here would be appreciated. I'm not looking for anyone to complete this program for me, simply steer me in the right direction as to what to do from this point forward.

Thanks guys,

[Mdogg2005]

And sorry, there really isn't much here and what I have might even be completely wrong, but I just wanted to at least set it up how I thought it needed to. Any and all help here is accepted, I'm new to C++ and this program is really just stumping me.

[Mdogg2005]

Anyone able to help?