unrecognized characters in console

/* Write a program to print a histogram of the frequencies of different characters in its input. */

#include <stdio.h>
#define ASCII_LIMIT 128

main() {
    int input;
    int characters[ASCII_LIMIT] = { 0 };
    while ((input = getchar()) != EOF) {
        ++characters[input];
    }

    for (int h = 0; h < ASCII_LIMIT; h++) {
        printf("%c: ", h);
        for (int g = 0; g < characters[h]; g++) {
            printf("x ");
        }
        putchar('\n');
    }
}



######### OUTPUT #########
bacon is delicious
^Z
 :

:
:
:
:
:
:
:
:
        :

: x
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:

:
:
:
:
 : x x
!:
":
#:
$:
%:
&:
':
(:
):
*:
+:
,:
-:
.:
/:
0:
1:
2:
3:
4:
5:
6:
7:
8:
9:
::
;:
<:
=:
>:
?:
@:
A:
B:
C:
D:
E:
F:
G:
H:
I:
J:
K:
L:
M:
N:
O:
P:
Q:
R:
S:
T:
U:
V:
W:
X:
Y:
Z:
[:
\:
]:
^:
_:
`:
a: x
b: x
c: x x
d: x
e: x
f:
g:
h:
i: x x x
j:
k:
l: x
m:
n: x
o: x x
p:
q:
r:
s: x x
t:
u: x
v:
w:
x:
y:
z:
{:
|:
}:
~:
: