CIS 170 (Devry) help Making Decisions/uophelp.com CIS 170 (Devry) help Making Decisions/uophelp.com | Page 17

A phone number always has a hyphen (-) in the 4th position. Make
ReadDials() return –4 in this case (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, the 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 into a digit and to verify
that the user has entered a valid phone number. Have the program work
for any number of phone numbers.
In the ToDigits() function uses the toupper function to convert any
letters entered to uppercase. All the error messages are to be written to
the output file from main() based on the return value from the functions.
Continue processing until the user enters a Q.
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