v0.40: Create exercises. Challenge the community.

clean_words

Your mission

Write a program that takes a single string argument and prints it with all whitespace runs collapsed to a single space and no spaces at the start or end.

See it in action

./clean_words "  cursor   found   another   shortcut  "

Expected result

cursor found another shortcut

Your checklist

For your own tracking. Tests grade your code.

A word is any sequence of characters that is not a space or a tab.
Every run of one or more spaces or tabs between two words must be replaced by exactly one space.
The output must not start or end with a space.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
Use only write.

More examples

./clean_words "already clean input"

Expected result

already clean input

./clean_words

Expected result

wrong number of arguments

Constraints

Expected files

clean_words.c

Allowed functions

write

clean_words

Words and tokens

Your mission

Write a program that takes a single string argument and prints it with all whitespace runs collapsed to a single space and no spaces at the start or end.

See it in action

./clean_words "  cursor   found   another   shortcut  "

Expected result

cursor found another shortcut

Your checklist

For your own tracking. Tests grade your code.

A word is any sequence of characters that is not a space or a tab.
Every run of one or more spaces or tabs between two words must be replaced by exactly one space.
The output must not start or end with a space.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
Use only write.

More examples

./clean_words "already clean input"

Expected result

already clean input

./clean_words

Expected result

wrong number of arguments

Constraints

Expected files

clean_words.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

02Leading, trailing, and inner whitespace collapsedWaiting

03Already normalized string unchangedWaiting

04Tabs treated as word separatorsWaiting

05Single word with no separatorsWaiting

06Too many argumentsWaiting

clean_words

Your mission

Write a program that takes a single string argument and prints it with all whitespace runs collapsed to a single space and no spaces at the start or end.

See it in action

./clean_words "  cursor   found   another   shortcut  "

Expected result

cursor found another shortcut

Your checklist

For your own tracking. Tests grade your code.

A word is any sequence of characters that is not a space or a tab.
Every run of one or more spaces or tabs between two words must be replaced by exactly one space.
The output must not start or end with a space.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
Use only write.

More examples

./clean_words "already clean input"

Expected result

already clean input

./clean_words

Expected result

wrong number of arguments

Constraints

Expected files

clean_words.c

Allowed functions

write

v0.40: Create exercises. Challenge the community.

Meet Studio →

clean_words

Words and tokens

Your mission

Write a program that takes a single string argument and prints it with all whitespace runs collapsed to a single space and no spaces at the start or end.

See it in action

./clean_words "  cursor   found   another   shortcut  "

Expected result

cursor found another shortcut

Your checklist

For your own tracking. Tests grade your code.

A word is any sequence of characters that is not a space or a tab.
Every run of one or more spaces or tabs between two words must be replaced by exactly one space.
The output must not start or end with a space.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
Use only write.

More examples

./clean_words "already clean input"

Expected result

already clean input

./clean_words

Expected result

wrong number of arguments

Constraints

Expected files

clean_words.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

02Leading, trailing, and inner whitespace collapsedWaiting

03Already normalized string unchangedWaiting

04Tabs treated as word separatorsWaiting

05Single word with no separatorsWaiting

06Too many argumentsWaiting