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# CSE 461: Programming Languages Concepts Prof. G. Tan Spring 2022 Homework 4: Racket warming up Due on Mar 6th at 6pm in Canvas. Submission: you should submit via Canvas a DrRacket file with Racket...

CSE 461: Programming Languages Concepts
Prof. G. Tan
Spring 2022
Homework 4: Racket warming up
Due on Mar 6th at 6pm in Canvas.
Submission: you should submit via Canvas a DrRacket file with Racket
tell the co
espondence between your code and questions.
1. (0 points) Go through a
ief tutorial about the DrRacket program-
ming environment at http:
docs.racket-lang.org/d
acket/index.
html.
2. (3 points) sum(start, end) computes the sum from start to end; e.g.,
sum(3, 6) computes XXXXXXXXXX, which is 18. It can be defined recur-
sively in the following way. Define the co
esponding Racket function,
following the definition below.
sum(start, end) =
{
start if start = end
sum(start, endâˆ’ 1) + end otherwise
and Male functions are a pair of mutually recursive functions defined
as follows:
F (0) = 1
M(0) = 0
F (n) = nâˆ’M(F (nâˆ’ 1)),when n > 0
M(n) = nâˆ’ F (M(nâˆ’ 1)),when n > 0
4. (3 points) A cash reward credit card rewards back to a customer a
portion of the charges the customer makes over a month. One such
credit card rewards back
(a) 1% for the first \$2000 of charges,
(b) 1.5% for the next \$2000 (that is, the portion between \$2000 and
\$4000),
1
http:
docs.racket-lang.org/d
acket/index.html
http:
docs.racket-lang.org/d
acket/index.html
(c) 2% for the next \$1500 (that is, the portion between \$4000 and
\$5500),
(d) and 2.5% for everything above \$5500.
Define the function reward, which consumes a charge amount and
computes the co
esponding reward amount.
2
Answered 1 days After Mar 03, 2022

## Solution

Arun Shankar answered on Mar 05 2022
SOLUTION.PDF