isprint

Your mission

Implement gm_isprint, your own isprint, which reports whether a character is printable, meaning it would show up as visible ink or a blank space on screen.

See it in action

gm_isprint(' ')

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return a non-zero value when c is a printable character, and 0 otherwise.
Printable means the byte falls in the range 0x20 to 0x7E inclusive.
Watch the edges: space (0x20) IS printable, but every control character below it is not.
0x7F (DEL) sits just past ~ and is NOT printable, even though it is a single byte.

More examples

gm_isprint('A')

Expected result

gm_isprint('\t')

Expected result

Constraints

Expected files

isprint.c

Allowed functions

None. Write every helper yourself.

libc

Standard C library

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

isprint

Characters and ASCII

Your mission

Implement gm_isprint, your own isprint, which reports whether a character is printable, meaning it would show up as visible ink or a blank space on screen.

See it in action

gm_isprint(' ')

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return a non-zero value when c is a printable character, and 0 otherwise.
Printable means the byte falls in the range 0x20 to 0x7E inclusive.
Watch the edges: space (0x20) IS printable, but every control character below it is not.
0x7F (DEL) sits just past ~ and is NOT printable, even though it is a single byte.

More examples

gm_isprint('A')

Expected result

gm_isprint('\t')

Expected result

Constraints

Expected files

isprint.c

Allowed functions

None. Write every helper yourself.

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

01Null byte is not printableWaiting

02Space is printableWaiting

03Letter is printableWaiting

04Last printable characterWaiting

05Tab is not printableWaiting

06Newline is not printableWaiting

07Control character is not printableWaiting

08DEL is not printableWaiting

isprint

Your mission

Implement gm_isprint, your own isprint, which reports whether a character is printable, meaning it would show up as visible ink or a blank space on screen.

See it in action

gm_isprint(' ')

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return a non-zero value when c is a printable character, and 0 otherwise.
Printable means the byte falls in the range 0x20 to 0x7E inclusive.
Watch the edges: space (0x20) IS printable, but every control character below it is not.
0x7F (DEL) sits just past ~ and is NOT printable, even though it is a single byte.

More examples

gm_isprint('A')

Expected result

gm_isprint('\t')

Expected result

Constraints

Expected files

isprint.c

Allowed functions

None. Write every helper yourself.

libc

Standard C library

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

isprint

Characters and ASCII

Your mission

Implement gm_isprint, your own isprint, which reports whether a character is printable, meaning it would show up as visible ink or a blank space on screen.

See it in action

gm_isprint(' ')

Expected result

Your checklist

For your own tracking. Tests grade your code.

Return a non-zero value when c is a printable character, and 0 otherwise.
Printable means the byte falls in the range 0x20 to 0x7E inclusive.
Watch the edges: space (0x20) IS printable, but every control character below it is not.
0x7F (DEL) sits just past ~ and is NOT printable, even though it is a single byte.

More examples

gm_isprint('A')

Expected result

gm_isprint('\t')

Expected result

Constraints

Expected files

isprint.c

Allowed functions

None. Write every helper yourself.

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

01Null byte is not printableWaiting

02Space is printableWaiting

03Letter is printableWaiting

04Last printable characterWaiting

05Tab is not printableWaiting

06Newline is not printableWaiting

07Control character is not printableWaiting

08DEL is not printableWaiting