v0.40: Create exercises. Challenge the community.

camel_fmt

Your mission

Write a program that reads a single identifier from the command line and prints it in lowerCamelCase.

See it in action

./camel_fmt "deploy_on_friday"

Expected result

deployOnFriday

Your checklist

For your own tracking. Tests grade your code.

Accept exactly one argument (argc must be 2). If not, print wrong number of arguments followed by a newline.
Walk through each character of the argument and remove every underscore.
The character immediately after each underscore must be uppercased.
The very first character of the output is always lowercase.
End the output with a newline.

More examples

./camel_fmt "get_user_name" | cat -e

Expected result

getUserName$

./camel_fmt | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

camel_fmt.c

Allowed functions

mallocfreewrite

Allowed headers

<stdlib.h>declares malloc and free

<unistd.h>declares write

camel_fmt

Transforming text

Your mission

Write a program that reads a single identifier from the command line and prints it in lowerCamelCase.

See it in action

./camel_fmt "deploy_on_friday"

Expected result

deployOnFriday

Your checklist

For your own tracking. Tests grade your code.

Accept exactly one argument (argc must be 2). If not, print wrong number of arguments followed by a newline.
Walk through each character of the argument and remove every underscore.
The character immediately after each underscore must be uppercased.
The very first character of the output is always lowercase.
End the output with a newline.

More examples

./camel_fmt "get_user_name" | cat -e

Expected result

getUserName$

./camel_fmt | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

camel_fmt.c

Allowed functions

mallocfreewrite

Allowed headers

<stdlib.h>declares malloc and free

<unistd.h>declares 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 string argumentWaiting

03Three-part identifierWaiting

04Two underscoresWaiting

05Four-part identifierWaiting

06Too many argumentsWaiting

07No underscoreWaiting

camel_fmt

Your mission

Write a program that reads a single identifier from the command line and prints it in lowerCamelCase.

See it in action

./camel_fmt "deploy_on_friday"

Expected result

deployOnFriday

Your checklist

For your own tracking. Tests grade your code.

Accept exactly one argument (argc must be 2). If not, print wrong number of arguments followed by a newline.
Walk through each character of the argument and remove every underscore.
The character immediately after each underscore must be uppercased.
The very first character of the output is always lowercase.
End the output with a newline.

More examples

./camel_fmt "get_user_name" | cat -e

Expected result

getUserName$

./camel_fmt | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

camel_fmt.c

Allowed functions

mallocfreewrite

Allowed headers

<stdlib.h>declares malloc and free

<unistd.h>declares write

v0.40: Create exercises. Challenge the community.

Meet Studio →

camel_fmt

Transforming text

Your mission

Write a program that reads a single identifier from the command line and prints it in lowerCamelCase.

See it in action

./camel_fmt "deploy_on_friday"

Expected result

deployOnFriday

Your checklist

For your own tracking. Tests grade your code.

Accept exactly one argument (argc must be 2). If not, print wrong number of arguments followed by a newline.
Walk through each character of the argument and remove every underscore.
The character immediately after each underscore must be uppercased.
The very first character of the output is always lowercase.
End the output with a newline.

More examples

./camel_fmt "get_user_name" | cat -e

Expected result

getUserName$

./camel_fmt | cat -e

Expected result

wrong number of arguments$

Constraints

Expected files

camel_fmt.c

Allowed functions

mallocfreewrite

Allowed headers

<stdlib.h>declares malloc and free

<unistd.h>declares 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 string argumentWaiting

03Three-part identifierWaiting

04Two underscoresWaiting

05Four-part identifierWaiting

06Too many argumentsWaiting

07No underscoreWaiting