slow and fast speed calculation

model · 2011-12-27 04:00:31

Hy all ,

Since i am trying to detect slow and fast motion of my moving object . ,Conceptually , When i move slow then my current and previous motion almost about near ,., not much difference ... so probably less difference and speed would be low . .

but if i move fast then more distance will cover at the same time . so speed will be more .

But some time i get distance some thing like

get this value

Distance : 1.1219e+006
speed :47.1996
Distance : 1.1219e+006
speed :47.1996
Distance : 1.1219e+006
speed :47.1996
Distance : 1.1219e+006
speed :47.1996
Distance : 1.1219e+006
speed :47.1996

i do't understand this reason .

any one could guide me please thanks

Bob · 2011-12-27 05:41:15

hi model

Distance : 1.1219e+006

Is this what is bothering you?

This is called standard index form.

It is used for very large or very small numbers.

Is that what you wanted?

Bob

model · 2011-12-27 07:15:31

yes so i think i should try to handle very large and very small numbers . but any idea how ?

Bob · 2011-12-27 11:54:12

What computer language?

Bob

model · 2011-12-27 13:32:21

I am using c++

Bob · 2011-12-27 20:42:32

hi model,

C++ will give you floating decimal forms for numbers unless you specify otherwise.

A short integer will only go up to 32,767,

and a long integer to 2,147,483,647.

But as you want to do calculations involving distance / speed / time the floating form is probably best.

So you probably don't need to do anything in order to handle very large or very small numbers.

Do you want to output numbers to the user in a more readable form?

Bob

model · 2011-12-28 22:01:27

yes .. I want output in more readable or understandable form for user .

model · 2011-12-29 00:15:34

since i am using double for speed and distance . and this output
Distance : 1.1219e+006
speed :47.1996

is terrible or not understandable specially for me .
so i want the output that user should easy to understand . and also should work for my project requirement .

model · 2011-12-29 00:18:24

Hy Bob ,

if floating point i meant double is best to use then how to get rid from very large and very small numbers ???

Bob · 2011-12-30 06:54:53

hi model

I'm not familiar with the code for this.

Can you just do the calculations in 'double' then set a new integer variable equal to the answer and output this?

ELSE

Convert 1.1219e+006 to a 'string' , split it into '1.1219' then 'e' then '006'.

Then construct an integer by 1.1219 x 10^006

Bob

model · 2011-12-30 21:16:32

ah you meant do calculation in double but show your ans in int form by casting double to int .

I see.. ok Thanks Bob .

Math Is Fun Forum

#1 2011-12-27 04:00:31

slow and fast speed calculation

#2 2011-12-27 05:41:15

Re: slow and fast speed calculation

#3 2011-12-27 07:15:31

Re: slow and fast speed calculation

#4 2011-12-27 11:54:12

Re: slow and fast speed calculation

#5 2011-12-27 13:32:21

Re: slow and fast speed calculation

#6 2011-12-27 20:42:32

Re: slow and fast speed calculation

#7 2011-12-28 22:01:27

Re: slow and fast speed calculation

#8 2011-12-29 00:15:34

Re: slow and fast speed calculation

#9 2011-12-29 00:18:24

Re: slow and fast speed calculation

#10 2011-12-30 06:54:53

Re: slow and fast speed calculation

#11 2011-12-30 21:16:32

Re: slow and fast speed calculation

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