strlen

Your mission

Implement gm_strlen, your own strlen, which counts characters in a string up to but not including the null terminator.

See it in action

gm_strlen("")

Expected result

Your checklist

For your own tracking. Tests grade your code.

Walk through the input character by character until you reach \0.
Return the total number of characters seen before that terminator.
Do not modify or write to the input buffer.

More examples

gm_strlen("docker said not today")

Expected result

Constraints

Expected files

strlen.c

Allowed functions

None. Write every helper yourself.

Allowed headers

<stddef.h>defines size_t

libc

Standard C library

Implements the contract of a function from the standard C library.

strlen

Strings: walking and searching

Your mission

Implement gm_strlen, your own strlen, which counts characters in a string up to but not including the null terminator.

See it in action

gm_strlen("")

Expected result

Your checklist

For your own tracking. Tests grade your code.

Walk through the input character by character until you reach \0.
Return the total number of characters seen before that terminator.
Do not modify or write to the input buffer.

More examples

gm_strlen("docker said not today")

Expected result

Constraints

Expected files

strlen.c

Allowed functions

None. Write every helper yourself.

Allowed headers

<stddef.h>defines size_t

libc

Standard C library

Implements the contract of a function from the standard C library.

Tests

Run the tests to grade your code

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

Build

01Empty stringWaiting

02Short wordWaiting

03String with spacesWaiting

04Single characterWaiting

05Longer stringWaiting

06Two wordsWaiting

strlen

Your mission

Implement gm_strlen, your own strlen, which counts characters in a string up to but not including the null terminator.

See it in action

gm_strlen("")

Expected result

Your checklist

For your own tracking. Tests grade your code.

Walk through the input character by character until you reach \0.
Return the total number of characters seen before that terminator.
Do not modify or write to the input buffer.

More examples

gm_strlen("docker said not today")

Expected result

Constraints

Expected files

strlen.c

Allowed functions

None. Write every helper yourself.

Allowed headers

<stddef.h>defines size_t

libc

Standard C library

Implements the contract of a function from the standard C library.

strlen

Strings: walking and searching

Your mission

Implement gm_strlen, your own strlen, which counts characters in a string up to but not including the null terminator.

See it in action

gm_strlen("")

Expected result

Your checklist

For your own tracking. Tests grade your code.

Walk through the input character by character until you reach \0.
Return the total number of characters seen before that terminator.
Do not modify or write to the input buffer.

More examples

gm_strlen("docker said not today")

Expected result

Constraints

Expected files

strlen.c

Allowed functions

None. Write every helper yourself.

Allowed headers

<stddef.h>defines size_t

libc

Standard C library

Implements the contract of a function from the standard C library.

Tests

Run the tests to grade your code

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

Build

01Empty stringWaiting

02Short wordWaiting

03String with spacesWaiting

04Single characterWaiting

05Longer stringWaiting

06Two wordsWaiting