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608 B
608 B
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Instructions
Write a program that prints the previous and next alphabet of a given alphabet.
- If the number of arguments is different from
1, print ('\n'). - If the length of the argument is different from
1, print ('\n') - If the argument is not a letter, print (
'\n') - Print the previous alphabet and the next alphabet except for the last and the first alphabet of the alphabet.
Usage
$ go run . | cat -e
$
$ go run . a | cat -e
ab$
$ go run . "B" | cat -e
ABC$
$ go run . "z" | cat -e
yz$
$ go run . "Hello World!" | cat -e
$
$ go run . "1" | cat -e
$