Why isn't my code showing any output in c? Is it mandatory to use getchar with putchar?

Question

https://code.sololearn.com/cCyqBnVQF7YV/?ref=app

Answer 1

The integer 4 is stored as its ASCII character counterpart, which is an invisible character.

http://www.asciitable.com/mobile/

You meant to store '4' instead of 4, perhaps.

Answer 2

putchar() writes a character to the standard output stream.

http://www.cplusplus.com/reference/cstdio/putchar/

getchar() reads a character from the standard input stream.

http://www.cplusplus.com/reference/cstdio/getchar/

puts() is simply a predefined function to print strings with a trailing newline at the end.

http://www.cplusplus.com/reference/cstdio/puts/

gets() is deprecated. Just don't use it.

https://stackoverflow.com/questions/30890696/why-gets-is-deprecated)

Answer 3

Thanks Hatsy Rei, but I also wanted to know the difference between getchar /putchar and gets/puts in c