Problem w/ FP

Functional programing makes simple things nearly imposible to do . for example I found this exercise on reddit

"create a program that will ask the users name, age, and reddit username. have it tell them the information back, in the format:
your name is (blank), you are (blank) years old, and your username is (blank)
for extra credit, have the program log this information in a file to be accessed later."

At first I dismissed it as stupidly trivial but then thought, is there even a way to do this in scheme? And I couldnt think of one. This just shows that scheme sucks for programs used by users. There is no sequential steps to actually accomplish anything

Wow, I'm surprised, this is pretty trivial in scheme. The only thing that's a little difficult is the file io, not because of functional style, but because it is different from C,C++,Java, and it I don't use file io with scheme very often. I'll have to look it up again.


;; for-each is a built in on my scheme implementation.
;(define (for-each operator lis)
;  (if (not (null? lis))
;    (begin (operator (car lis))
;           (for-each operator (cdr lis)))))

(define (print-user-info name age reddit-username)
  (for-each display (list "your name is " name ", you are " age " years old, and your username is " reddit-username))
  (newline))

(define (main log-file)
  (let* ((name (begin (display "Please enter your name: ") (read)))
         (age  (begin (display "Please enter your age: ") (read)))
         (reddit-username (begin (display "Please enter your reddit user name: ") (read))))
    (print-user-info name age reddit-username)
    ;(save-user-info-to-log-file log-file name age reddit-user-name) ;; Lemme look up scheme file io again...
    ))

(main #f)


(load "read.scm")
;loading read.scm
Please enter your name: timmy
Please enter your age: 5634
Please enter your reddit user name: ti_mmy
your name is timmy, you are 5634 years old, and your username is ti_mmy
;done loading read.scm
#<unspecified>