swap_bits

Your mission

Write a function that exchanges the upper nibble and the lower nibble of a byte and returns the result.

See it in action

swap_bits(0xF0)

Expected result

Your checklist

For your own tracking. Tests grade your code.

A byte is made of two groups of 4 bits called nibbles: the high nibble (bits 7-4) and the low nibble (bits 3-0).
Your function must swap those two nibbles and return the resulting byte.
For example, 0xF0 (high nibble: 0xF, low nibble: 0x0) becomes 0x0F.

More examples

swap_bits(0xAB)

Expected result

Constraints

Expected files

swap_bits.c

Allowed functions

None. Write every helper yourself.

swap_bits

Bits and representation

Your mission

Write a function that exchanges the upper nibble and the lower nibble of a byte and returns the result.

See it in action

swap_bits(0xF0)

Expected result

Your checklist

For your own tracking. Tests grade your code.

A byte is made of two groups of 4 bits called nibbles: the high nibble (bits 7-4) and the low nibble (bits 3-0).
Your function must swap those two nibbles and return the resulting byte.
For example, 0xF0 (high nibble: 0xF, low nibble: 0x0) becomes 0x0F.

More examples

swap_bits(0xAB)

Expected result

Constraints

Expected files

swap_bits.c

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

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

Build

01Swap 0xF0 → 0x0FWaiting

02Swap 0xAB → 0xBAWaiting

03Swap 0x10 → 0x01Waiting

04Swap 0x3C → 0xC3Waiting

05Swap 0x00 → 0x00Waiting

06Swap 0xFF → 0xFFWaiting

swap_bits

Your mission

Write a function that exchanges the upper nibble and the lower nibble of a byte and returns the result.

See it in action

swap_bits(0xF0)

Expected result

Your checklist

For your own tracking. Tests grade your code.

A byte is made of two groups of 4 bits called nibbles: the high nibble (bits 7-4) and the low nibble (bits 3-0).
Your function must swap those two nibbles and return the resulting byte.
For example, 0xF0 (high nibble: 0xF, low nibble: 0x0) becomes 0x0F.

More examples

swap_bits(0xAB)

Expected result

Constraints

Expected files

swap_bits.c

Allowed functions

None. Write every helper yourself.

swap_bits

Bits and representation

Your mission

Write a function that exchanges the upper nibble and the lower nibble of a byte and returns the result.

See it in action

swap_bits(0xF0)

Expected result

Your checklist

For your own tracking. Tests grade your code.

A byte is made of two groups of 4 bits called nibbles: the high nibble (bits 7-4) and the low nibble (bits 3-0).
Your function must swap those two nibbles and return the resulting byte.
For example, 0xF0 (high nibble: 0xF, low nibble: 0x0) becomes 0x0F.

More examples

swap_bits(0xAB)

Expected result

Constraints

Expected files

swap_bits.c

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

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

Build

01Swap 0xF0 → 0x0FWaiting

02Swap 0xAB → 0xBAWaiting

03Swap 0x10 → 0x01Waiting

04Swap 0x3C → 0xC3Waiting

05Swap 0x00 → 0x00Waiting

06Swap 0xFF → 0xFFWaiting