v0.40: Create exercises. Challenge the community.

split

Your mission

Implement a function that cuts a string into tokens wherever any character from a caller-supplied delimiter set appears, and returns those tokens as a malloc'd, NULL-terminated array of strings.

See it in action

split("cargo build --release", " -")

Expected result

["cargo", "build", "release", NULL]

Your checklist

For your own tracking. Tests grade your code.

The function signature is char **split(char *str, char *charset);.
Any character present in charset acts as a delimiter; consecutive delimiters produce no empty token between them.
Allocate the array of pointers and each token string with malloc.
Terminate the returned array with a NULL pointer.
If str contains no tokens, return a malloc'd array whose only element is NULL.
You may only use malloc; no other library function is allowed.

More examples

split("one,two,,three", ",")

Expected result

["one", "two", "three", NULL]

split(",,,,", ",")

Expected result

[NULL]

Constraints

Expected files

split.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

split

Dynamic memory

Your mission

Implement a function that cuts a string into tokens wherever any character from a caller-supplied delimiter set appears, and returns those tokens as a malloc'd, NULL-terminated array of strings.

See it in action

split("cargo build --release", " -")

Expected result

["cargo", "build", "release", NULL]

Your checklist

For your own tracking. Tests grade your code.

The function signature is char **split(char *str, char *charset);.
Any character present in charset acts as a delimiter; consecutive delimiters produce no empty token between them.
Allocate the array of pointers and each token string with malloc.
Terminate the returned array with a NULL pointer.
If str contains no tokens, return a malloc'd array whose only element is NULL.
You may only use malloc; no other library function is allowed.

More examples

split("one,two,,three", ",")

Expected result

["one", "two", "three", NULL]

split(",,,,", ",")

Expected result

[NULL]

Constraints

Expected files

split.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

Tests

Run the tests to grade your code

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

Build

01Splits on space and dash simultaneouslyWaiting

02Consecutive delimiters produce no empty tokenWaiting

03All-delimiter input returns empty splitWaiting

04Normal whitespace-delimited sentenceWaiting

05Delimiter not found in stringWaiting

06Single-char delimiter splits cleanlyWaiting

split

Your mission

Implement a function that cuts a string into tokens wherever any character from a caller-supplied delimiter set appears, and returns those tokens as a malloc'd, NULL-terminated array of strings.

See it in action

split("cargo build --release", " -")

Expected result

["cargo", "build", "release", NULL]

Your checklist

For your own tracking. Tests grade your code.

The function signature is char **split(char *str, char *charset);.
Any character present in charset acts as a delimiter; consecutive delimiters produce no empty token between them.
Allocate the array of pointers and each token string with malloc.
Terminate the returned array with a NULL pointer.
If str contains no tokens, return a malloc'd array whose only element is NULL.
You may only use malloc; no other library function is allowed.

More examples

split("one,two,,three", ",")

Expected result

["one", "two", "three", NULL]

split(",,,,", ",")

Expected result

[NULL]

Constraints

Expected files

split.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

split

Dynamic memory

Your mission

Implement a function that cuts a string into tokens wherever any character from a caller-supplied delimiter set appears, and returns those tokens as a malloc'd, NULL-terminated array of strings.

See it in action

split("cargo build --release", " -")

Expected result

["cargo", "build", "release", NULL]

Your checklist

For your own tracking. Tests grade your code.

The function signature is char **split(char *str, char *charset);.
Any character present in charset acts as a delimiter; consecutive delimiters produce no empty token between them.
Allocate the array of pointers and each token string with malloc.
Terminate the returned array with a NULL pointer.
If str contains no tokens, return a malloc'd array whose only element is NULL.
You may only use malloc; no other library function is allowed.

More examples

split("one,two,,three", ",")

Expected result

["one", "two", "three", NULL]

split(",,,,", ",")

Expected result

[NULL]

Constraints

Expected files

split.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

Tests

Run the tests to grade your code

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

Build

01Splits on space and dash simultaneouslyWaiting

02Consecutive delimiters produce no empty tokenWaiting

03All-delimiter input returns empty splitWaiting

04Normal whitespace-delimited sentenceWaiting

05Delimiter not found in stringWaiting

06Single-char delimiter splits cleanlyWaiting

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