Hints

• In testing the WOTRATE.C program, it is essential that you prepare a number of test cases for which you know "with certainty" what the correct answers are - so that you can decide whether the program is giving these correct answers or not. "Certainty" is hard to come by, of course. But in this particular case, you may be able to use some of the work you have done in previous lab(s) to generate "reliable" test cases.

• In Exercise 3 you are asked to write two new functions. Implicitly, of course, you are also expected to check whether your functions Sine() and Cosine() work correctly or not. But note that a function does not do anything unless and until it is called. So to properly complete this exercise, there must be a main() function which allows you to exercise the Sine() and Cosine() functions.

• For Exercise 3, your essential problem is to convert from degrees to radians - since, if you could do that, you could the use the existing library functions sin(x) and cos(x) to complete the required calculations. So: as a first step, try to write a program which just has a main() function which does this conversion from degrees to radians. Then modify this program so as to encapsulate the actual conversion proper in a function of its own. Then add the function Sine(), and finally the function Cosine. At each stage make sure that everything is working correctly: do not try to do too much at any one step.