On 16/08/15 21:28, Joseph Gulizia wrote:
Assume that the grader defines two variables A and B for you. Write a program which prints out the value min(A, B)
So far a trivial exercise.
However, there is a catch: your program is not allowed to use the min function. Instead, use max in a clever way to simulate min.
Now its just a stupid exercise. I rally hate when teachers do this. It shows great lack of imagination and actively teaches bad habits... sigh!
Hint, Method 1 What is max(-A, -B)?
Hint, Method 2 What is min(A, B)+max(A, B)?
Note that these are two separate methods. You don't need both of them. In fact you don't really need either of them! Writing the min functionality directly is not exactly difficult!
My last code that worked somewhat ----------------------------------- Original = max(A, B) Opposite = max(-A, -B) Grader =max(-A,- B)+max(A, B) print (Grader)
OK, Can you explain how you thought that might work?
Before running your code: We defined A equal to 62 and B equal to 36. 26
Which is what doing the math suggests: max (-62, -36) is -36 and max(62,36) is 62 so 62 + (-36) is 26
Expected this correct output: 36
Which is the correct min of 36 and 62
Result of grading: Your output is not correct. Spreadsheet examples: A B Max(A, B) Min(A, B) Min(A, B)+Max(A, B) Max(A, B)+Max(A, B) Min(A, B)+Min(A, B) 10 5 10 5 15 20 10 5 10 10 5 15 20 10 9 12 12 9 21 24 18 12 9 12 9 21 24 18 22 37 37 22 59 74 44 37 22 37 22 59 74 44 45 68 68 45 113 136 90 68 45 68 45 113 136 90 Max(-A,- B) Max(-A,- B)+Max(A, B) Max(-A,- B)-Max(A, B) -5 5 -15 -5 5 -15 -9 3 -21 -9 3 -21 -22 15 -59 -22 15 -59
This probably lost a little in (email) translation, but looks like overkill to me. Choose one of the two methods above, since that's what they ask you to do. But it's just as easy to implement min() directly: if A < B: min = A else: min = B HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
