int_to_str_base

Numbers and bases24

Objective

Implement a function that allocates and returns the textual representation of a signed integer written in a chosen numeric base.

Steps

The function receives an int value and a base between 2 and 16 inclusive.
Return a freshly malloc-allocated, null-terminated string holding value written in the requested base.
Digits 0 through 9 use the characters 0-9; digits 10 through 15 use lowercase a-f.
Only base 10 may produce a leading - sign. For every other base, encode the raw two's-complement magnitude as if value were unsigned.
INT_MIN must be handled correctly without overflow.
If base is outside the range 2 to 16, return NULL.
The prototype is char *int_to_str_base(int value, int base);.
Only malloc is allowed.

examples

$ int_to_str_base(42, 10)

$ int_to_str_base(255, 16)

$ int_to_str_base(-13, 2)

11111111111111111111111111110011

Constraints

Expected files

int_to_str_base.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

Tests

Run the tests to grade your code

Build

01Zero in base 10

02Positive integer in base 10

03Negative integer in base 10

04INT_MIN edge case in base 10

05Positive integer in base 2

06Positive integer in base 16

07Positive integer in base 8

08Memorable hex word

09Negative value keeps its unsigned bit pattern outside base 10

10INT_MIN keeps its unsigned bit pattern outside base 10

11Base outside 2 to 16 returns NULL

int_to_str_base

Objective

Implement a function that allocates and returns the textual representation of a signed integer written in a chosen numeric base.

Steps

The function receives an int value and a base between 2 and 16 inclusive.
Return a freshly malloc-allocated, null-terminated string holding value written in the requested base.
Digits 0 through 9 use the characters 0-9; digits 10 through 15 use lowercase a-f.
Only base 10 may produce a leading - sign. For every other base, encode the raw two's-complement magnitude as if value were unsigned.
INT_MIN must be handled correctly without overflow.
If base is outside the range 2 to 16, return NULL.
The prototype is char *int_to_str_base(int value, int base);.
Only malloc is allowed.

examples

$ int_to_str_base(42, 10)

$ int_to_str_base(255, 16)

$ int_to_str_base(-13, 2)

11111111111111111111111111110011

Constraints

Expected files

int_to_str_base.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

int_to_str_base

Numbers and bases24

Objective

Implement a function that allocates and returns the textual representation of a signed integer written in a chosen numeric base.

Steps

The function receives an int value and a base between 2 and 16 inclusive.
Return a freshly malloc-allocated, null-terminated string holding value written in the requested base.
Digits 0 through 9 use the characters 0-9; digits 10 through 15 use lowercase a-f.
Only base 10 may produce a leading - sign. For every other base, encode the raw two's-complement magnitude as if value were unsigned.
INT_MIN must be handled correctly without overflow.
If base is outside the range 2 to 16, return NULL.
The prototype is char *int_to_str_base(int value, int base);.
Only malloc is allowed.

examples

$ int_to_str_base(42, 10)

$ int_to_str_base(255, 16)

$ int_to_str_base(-13, 2)

11111111111111111111111111110011

Constraints

Expected files

int_to_str_base.c

Allowed functions

malloc

Allowed headers

<stdlib.h>declares malloc

<stddef.h>defines NULL

Tests

Run the tests to grade your code

Build

01Zero in base 10

02Positive integer in base 10

03Negative integer in base 10

04INT_MIN edge case in base 10

05Positive integer in base 2

06Positive integer in base 16

07Positive integer in base 8

08Memorable hex word

09Negative value keeps its unsigned bit pattern outside base 10

10INT_MIN keeps its unsigned bit pattern outside base 10

11Base outside 2 to 16 returns NULL