Lab 7

Welcome to Lab 7. We're working on...functions. So for this lab we are going to write two simple functions and then use them in our main lab function.

Details

In this lab we are going to read in a command and then decide what to do. There are two commands that we will work on.

• toString
  • this will take a number and give us the string equivalent
  • signature: string convertNumber( int number );
  • output: when toString is the command, your program reads the command and the number. It calls its function, convertNumber. It should output this:
    

    Converted from Number to String
    Number: 
    String:
    

    After the word "Number: " there should be the number that was entered: e.g. 1. After the word "String: " there should be the string, e.g. "one".

• toNumber

  • this will take a string and give us the number equivalent
  • signature: int convertString( string word );
  • output: when toString is the command, your program reads the command and the number. It calls its function, convertNumber. It should output this:
    

    Converted from String to Number
    String:
    Number: 
    

    After the word "Number: " there should be the number that was entered: e.g. 1. After the word "String: " there should be the string, e.g. "one".

  For both of these functions we are only working with the numbers 0-9. If the number given to convertNumber is not between 0 and 9, then return the string "error". If the word given to convertString isn't, "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", or "nine", then return -1.

Input

The following is a sample input:

toString 7
toNumber four

so your lab should run until the input fails.

Output

If your program was run using the input above your program would ouput this:

Converted from Number to String 
Number: 7
String: seven
Converted from String to Number
String: four
Number: 4

Requirements

In order for this lab to work, you must do the following:

• put your function signatures in a file called: convert.h
• the principle function for this lab is: void stringNumberConvert( istream& in, ostream& out );
• you must also declare and write the two functions list above.

Due

Like all labs, this is due at the end of lab. Tuesday, October 14 at 6:50. I will accept this for an additional 65 hours, or until 11:50AM on Friday

Grading

When you are done, zip up your convert.h file and implementation file(s) and turn them into Web-CAT.