printf, how to insert decimal point for integer

Question

I have an UINT16 unsigned integer of say

4455, 312, 560 or 70.

How to use printf to insert a decimal point before the last two

Answer 1

with a int x1000 precision 1234123 -> 1234.123

printf("%4d.%.3d\n", x / 1000, x % 1000);

if you need to round to 2 decimal

printf("%4d.%.2d\n", ((x+5)/10) / 100, ((x+5)/10) % 100);

only tested with positive

input        print
000004       0.00
000005       0.01

000014       0.01
000015       0.02

000100       0.10
000101       0.10

000105       0.11
000994       0.99
000995       1.00
...

Answer 2

%.2d could add the extra padding zeros

printf("%d.%.2d", n / 100, n % 100);

For example, if n is 560, the output is: 5.60

EDIT : I didn't notice it's UINT16 at first, according to @Eric Postpischil's comment, it's better to use:

printf("%d.%.2d", (int) (x/100), (int) (x%100));

Answer 3

printf("%d.%.2d", x / 100, x % 100);

Answer 4

You can use printf directly with out using float

printf("%d.%02d", num/100, num%100);

%02d means right align with zero padding.

if num is 4455 ==>output is 44.55  
if num is 203  ==>output is 2.03

EDIT:
by seeing comment from @ Eric Postpischil , it's better to use like this.

printf("%d.%02d", (int) (num/100), (int) (num%100));