Use make to build the target rnc.exe

Use make clean to remove intermediate build and executable files

Use make run to run the application

• Usage is as follows:
  1. Enter the first Roman Numeral and press return
  2. Enter an operation (either + or -) and press return
  3. Enter a second Roman Numeral and press return

Use make check to run the tests

• A number of invalid inputs could be provided to this program. Some examples include:
  • A value entered that contains non roman numeral characaters, i.e. H or HI
  • A value entered contains valid roman numeral characters that are out of sequence VIM
  • Addition can result in a number higher than the max value of 3999 or MMMCMXCIX
  • Subtraction can result in a number less than or equal to 0

The above cases will result in an error being set on the RNResult struct which must be passed into the add and subtract methods.