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Casting

Posted on 1998-09-23

1 solution

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Last Modified: 2010-04-15

Hi,

I have an array of float data type of which I tried to change them to round numbers by casting them to unsigned char data type. But for data such as 3.99, the result of the casting is 3. What can I do so that all the data will be rounded to their nearest values?

Rgds,
MY

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Question by:misumi

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5 Comments

LVL 10

Accepted Solution

by:rbr

rbr earned 10 total points

ID: 12530061998-09-23

use floor and ceil.

double x=3.99;
char c;

c=(char)ceil(x);

LVL 84

Expert Comment

by:ozo

ID: 12530071998-09-23

It won't be the nearest value if you have

double x=3.01;
char c;

c=(char)ceil(x);

Author Comment

by:misumi

ID: 12530081998-09-23

So, what should I do? Must I use both ceil and floor together?

LVL 84

Expert Comment

by:ozo

ID: 12530091998-09-24

You might consider
c=(char)ceil(x-0.5);

LVL 2

Expert Comment

by:rayb

ID: 12530101998-09-25

Or a variation on ozo's last response:
int n= (int)(your_array_of_floats[index] + 0.5);

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