For example, if the input were
5 3.7 5.2 -4.7 -62 14.7
the output might be
Sum: -43.1
Average: -8.62
3 of your 5 numbers are positive.
Also turn in sample runs with well-chosen test cases.
Note: in C or C++, you can demonstrate the use of pointers and memory management by using a pointer rather than an array declaration, and allocating exactly as much memory as necessary. In Java, this is the only natural way to do it.
Write three functions sum
,
average
, and count-positive
, each of which
takes in a list of numbers and returns a number.
If you want
to practice your Scheme I/O, you can then write a 0-parameter function
named hw2
that asks the user for a number, prints an error
message if it's less than 0, more than 100, or not an integer,
and otherwise asks for that many numbers, forms them into a list, and
prints the results as above.
If you want to learn about Scheme vectors, try doing the same thing using a vector rather than a list.
As in the Scheme version, using Prolog lists.