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.
Step 3: Create a New Project
Create a new project and name it LAB4.
Write your code using the processing logic in Step 2 (above). Make sure that you save your
program.
Step 4: Compile and Execute
a)
Compile your program. Eliminate all the syntax errors.
b)
Build your program and verify the results of the program. Make corrections to the
program logic, if necessary, until the results of the program execution are what you expect.