negative numbers with 2 digits of percision

[gtu]

i have a set of numbers from aprox -2000 to 2000. if i have for example -1234 i need to write it out like -12.34.

i cant find a way to do this. 

this works good for positive numbers:

please help. thank you

[BillTür]

Why shouldn't this work for negative numbers? The integer quotient should be negative if you feed a negative number.

One method to work around this would be to check if the input is a negative number before dividing by 100. I don't think this is necessary though seeing that the integer quotient is the smaller(!) negative number anyway. By adding the remainder it should give the two digit precision number just fine.

[gtu]

if the input value is negative the result is something like 650,12 for example. i know that negative numbers are represented in two's complement so the result is kind of expected.

[GerdW · Accepted solution]

Hi gtu,

it's not a problem of two's complement, it's just simple math: the remainder has to be positive, so quotient will be one less then expected (by you) for negative numbers.

Solved by simple math:

[gtu]

thank you so much!!! 🙂

[Rod42]

Erm... Am I missing something? Couldn't you just convert to a double and divide by (double) 100? ... then use %.2f as a format for display?

Rod.

EDIT: If your numbers do range +/- 2000, there's probably enough resolution in a single precision float.

[gtu]

i tried to solve it this way but it is not working. yet again is good for positive numbers and it returns numbers around 650 for negative numbers.

[GerdW]

Hi gtu,

you really tried that?

[Rod42]

Is you input blue wire signed or unsigned? It should be signed (I16 or I32). Getting numbers around 650 (ie 65000 before dividing) looks very much like you have the bit pattern of a small negative number, but it is being treated as an UNsigned value.

Rod

EDIT: I am guessing, but is your input blue wire a U16?