flip_case

Transforming text16

Objective

Write a program that takes a single string argument and prints it with every letter's case inverted, followed by a newline.

Steps

Each lowercase letter in the input must become its uppercase equivalent.
Each uppercase letter in the input must become its lowercase equivalent.
Any character that is not a letter passes through unchanged.
End the output with a newline.
If the program receives any number of arguments other than exactly one, print wrong number of arguments followed by a newline.

examples

$ ./flip_case "gcc Yelled Back" | cat -e

GCC yELLED bACK$

$ ./flip_case "Hello, World!" | cat -e

hELLO, wORLD!$

$ ./flip_case | cat -e

wrong number of arguments$

Constraints

Expected files

flip_case.c

Allowed functions

write

Tests

Run the tests to grade your code

Build

01No arguments

02Mixed case with dev-culture string

03Letters and punctuation

04Alphanumeric mix

05Empty string

06All uppercase input

07All lowercase input

flip_case

Objective

Write a program that takes a single string argument and prints it with every letter's case inverted, followed by a newline.

Steps

Each lowercase letter in the input must become its uppercase equivalent.
Each uppercase letter in the input must become its lowercase equivalent.
Any character that is not a letter passes through unchanged.
End the output with a newline.
If the program receives any number of arguments other than exactly one, print wrong number of arguments followed by a newline.

examples

$ ./flip_case "gcc Yelled Back" | cat -e

GCC yELLED bACK$

$ ./flip_case "Hello, World!" | cat -e

hELLO, wORLD!$

$ ./flip_case | cat -e

wrong number of arguments$

Constraints

Expected files

flip_case.c

Allowed functions

write

flip_case

Transforming text16

Objective

Write a program that takes a single string argument and prints it with every letter's case inverted, followed by a newline.

Steps

Each lowercase letter in the input must become its uppercase equivalent.
Each uppercase letter in the input must become its lowercase equivalent.
Any character that is not a letter passes through unchanged.
End the output with a newline.
If the program receives any number of arguments other than exactly one, print wrong number of arguments followed by a newline.

examples

$ ./flip_case "gcc Yelled Back" | cat -e

GCC yELLED bACK$

$ ./flip_case "Hello, World!" | cat -e

hELLO, wORLD!$

$ ./flip_case | cat -e

wrong number of arguments$

Constraints

Expected files

flip_case.c

Allowed functions

write

Tests

Run the tests to grade your code

Build

01No arguments

02Mixed case with dev-culture string

03Letters and punctuation

04Alphanumeric mix

05Empty string

06All uppercase input

07All lowercase input