first_arg

Your mission

Write a program that outputs the first command-line argument followed by a newline.

See it in action

./first_arg prod is watching

Expected result

prod

Your checklist

For your own tracking. Tests grade your code.

When at least one argument is given, display the first one exactly as received.
When no argument is provided (argc is 1), print wrong number of arguments followed by a newline.
Do not add extra spaces, tabs, or any other characters around the output.

More examples

./first_arg

Expected result

wrong number of arguments

Constraints

Expected files

first_arg.c

Allowed functions

write

first_arg

Command line

Your mission

Write a program that outputs the first command-line argument followed by a newline.

See it in action

./first_arg prod is watching

Expected result

prod

Your checklist

For your own tracking. Tests grade your code.

When at least one argument is given, display the first one exactly as received.
When no argument is provided (argc is 1), print wrong number of arguments followed by a newline.
Do not add extra spaces, tabs, or any other characters around the output.

More examples

./first_arg

Expected result

wrong number of arguments

Constraints

Expected files

first_arg.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

02Three arguments: only first printedWaiting

03Single argumentWaiting

04Four argumentsWaiting

05Mixed-case argument preserved as-isWaiting

first_arg

Your mission

Write a program that outputs the first command-line argument followed by a newline.

See it in action

./first_arg prod is watching

Expected result

prod

Your checklist

For your own tracking. Tests grade your code.

When at least one argument is given, display the first one exactly as received.
When no argument is provided (argc is 1), print wrong number of arguments followed by a newline.
Do not add extra spaces, tabs, or any other characters around the output.

More examples

./first_arg

Expected result

wrong number of arguments

Constraints

Expected files

first_arg.c

Allowed functions

write

first_arg

Command line

Your mission

Write a program that outputs the first command-line argument followed by a newline.

See it in action

./first_arg prod is watching

Expected result

prod

Your checklist

For your own tracking. Tests grade your code.

When at least one argument is given, display the first one exactly as received.
When no argument is provided (argc is 1), print wrong number of arguments followed by a newline.
Do not add extra spaces, tabs, or any other characters around the output.

More examples

./first_arg

Expected result

wrong number of arguments

Constraints

Expected files

first_arg.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

02Three arguments: only first printedWaiting

03Single argumentWaiting

04Four argumentsWaiting

05Mixed-case argument preserved as-isWaiting