Write a program my$\_$ngram.c in C; It will count the number of occurrences per character.

My Ngram will take $1$or multiple strings as arguments $($argv$)$ It will display, one per line: each character, and the numbers of times it appears. No duplicates lines. Order will be alphanumerical.

You can only use printf$(3)$and write$(2).$

You can NOT use:

Any functions$/$syscalls which does not appear in the previous list

Yes, it includes exit

Multiline macros are forbidden

Include another $.$c is forbidden

Macros with logic $($while$/$if$/$variables$/...)$ are forbidden

Example outputs:

$1$:

$$>./$my$\_$ngram "aaabb" "abc"

a:$4$

b:$3$

c:$1$

$$>$

$2$:

$ $./$my$\_$ngram "abcdef"

a:$1$

b:$1$

c:$1$

d:$1$

e:$1$

f:$1$

$

$3$:

$ $./$my$\_$ngram

$""$

:$8$

$