v0.40: Create exercises. Challenge the community.

shift_alpha

Your mission

Write a program that receives a single string argument and prints it with every letter advanced by one position in the alphabet.

See it in action

./shift_alpha "xyz"

Expected result

yza

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one argument.
Each lowercase letter is shifted forward by one: a becomes b, y becomes z.
z wraps around and becomes a. The same wrap applies to uppercase: Z becomes A.
Uppercase letters shift to the next uppercase letter. Case is preserved.
Any character that is not a letter is printed unchanged.
The output is always followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.

More examples

./shift_alpha "ci passed locally" | cat -e

Expected result

dj qbttfe mpdbmmz$

./shift_alpha | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

shift_alpha.c

Allowed functions

write

shift_alpha

Transforming text

Your mission

Write a program that receives a single string argument and prints it with every letter advanced by one position in the alphabet.

See it in action

./shift_alpha "xyz"

Expected result

yza

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one argument.
Each lowercase letter is shifted forward by one: a becomes b, y becomes z.
z wraps around and becomes a. The same wrap applies to uppercase: Z becomes A.
Uppercase letters shift to the next uppercase letter. Case is preserved.
Any character that is not a letter is printed unchanged.
The output is always followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.

More examples

./shift_alpha "ci passed locally" | cat -e

Expected result

dj qbttfe mpdbmmz$

./shift_alpha | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

shift_alpha.c

Allowed functions

write

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01No argumentsWaiting

02Empty stringWaiting

03Wrap at end of alphabetWaiting

04Mixed word inputWaiting

05Mixed case with punctuationWaiting

06Wrap uppercase and lowercaseWaiting

07Digits pass through unchangedWaiting

shift_alpha

Your mission

Write a program that receives a single string argument and prints it with every letter advanced by one position in the alphabet.

See it in action

./shift_alpha "xyz"

Expected result

yza

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one argument.
Each lowercase letter is shifted forward by one: a becomes b, y becomes z.
z wraps around and becomes a. The same wrap applies to uppercase: Z becomes A.
Uppercase letters shift to the next uppercase letter. Case is preserved.
Any character that is not a letter is printed unchanged.
The output is always followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.

More examples

./shift_alpha "ci passed locally" | cat -e

Expected result

dj qbttfe mpdbmmz$

./shift_alpha | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

shift_alpha.c

Allowed functions

write

shift_alpha

Transforming text

Your mission

Write a program that receives a single string argument and prints it with every letter advanced by one position in the alphabet.

See it in action

./shift_alpha "xyz"

Expected result

yza

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one argument.
Each lowercase letter is shifted forward by one: a becomes b, y becomes z.
z wraps around and becomes a. The same wrap applies to uppercase: Z becomes A.
Uppercase letters shift to the next uppercase letter. Case is preserved.
Any character that is not a letter is printed unchanged.
The output is always followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.

More examples

./shift_alpha "ci passed locally" | cat -e

Expected result

dj qbttfe mpdbmmz$

./shift_alpha | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

shift_alpha.c

Allowed functions

write

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01No argumentsWaiting

02Empty stringWaiting

03Wrap at end of alphabetWaiting

04Mixed word inputWaiting

05Mixed case with punctuationWaiting

06Wrap uppercase and lowercaseWaiting

07Digits pass through unchangedWaiting

v0.40: Create exercises. Challenge the community.

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