alpha_fold

Transforming text24

Objective

Write a program that takes a string and prints it after folding each lowercase letter to its alphabetical opposite, then a newline.

Steps

Lowercase letters are folded: a becomes z, b becomes y, ..., z becomes a.
Uppercase letters are left exactly as they appear, they are never folded.
Non-alphabetical characters (digits, spaces, punctuation) are printed unchanged.
If the argument count is not exactly 1, print wrong number of arguments followed by a newline.

examples

$ ./alpha_fold "hello"

svool

$ ./alpha_fold "Hello" | cat -e

Hvool$

$ ./alpha_fold "deploy on friday" | cat -e

wvkolb lm uirwzb$

$ ./alpha_fold | cat -e

wrong number of arguments$

Constraints

Expected files

alpha_fold.c

Allowed functions

write

Tests

Run the tests to grade your code

Build

01No arguments

02All lowercase

03Uppercase letters unchanged

04Lowercase with spaces

05Two words mixed case

06Boundary characters

07Empty string

alpha_fold

Objective

Write a program that takes a string and prints it after folding each lowercase letter to its alphabetical opposite, then a newline.

Steps

Lowercase letters are folded: a becomes z, b becomes y, ..., z becomes a.
Uppercase letters are left exactly as they appear, they are never folded.
Non-alphabetical characters (digits, spaces, punctuation) are printed unchanged.
If the argument count is not exactly 1, print wrong number of arguments followed by a newline.

examples

$ ./alpha_fold "hello"

svool

$ ./alpha_fold "Hello" | cat -e

Hvool$

$ ./alpha_fold "deploy on friday" | cat -e

wvkolb lm uirwzb$

$ ./alpha_fold | cat -e

wrong number of arguments$

Constraints

Expected files

alpha_fold.c

Allowed functions

write

alpha_fold

Transforming text24

Objective

Write a program that takes a string and prints it after folding each lowercase letter to its alphabetical opposite, then a newline.

Steps

Lowercase letters are folded: a becomes z, b becomes y, ..., z becomes a.
Uppercase letters are left exactly as they appear, they are never folded.
Non-alphabetical characters (digits, spaces, punctuation) are printed unchanged.
If the argument count is not exactly 1, print wrong number of arguments followed by a newline.

examples

$ ./alpha_fold "hello"

svool

$ ./alpha_fold "Hello" | cat -e

Hvool$

$ ./alpha_fold "deploy on friday" | cat -e

wvkolb lm uirwzb$

$ ./alpha_fold | cat -e

wrong number of arguments$

Constraints

Expected files

alpha_fold.c

Allowed functions

write

Tests

Run the tests to grade your code

Build

01No arguments

02All lowercase

03Uppercase letters unchanged

04Lowercase with spaces

05Two words mixed case

06Boundary characters

07Empty string