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How to generate random FLOAT numbers between a specified range?

Posted on 2003-11-17
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Last Modified: 2007-12-19
Hello experts..!

How can I generate random float numbers in a particular range?

I know I can use: (float)rand()

But how could I get numbers between the ranges -5 and 20 lets say?

Thanks..
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Question by:lost_bits1110
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Dexstar earned 400 total points
ID: 9765648
lost_bits1110:

> I know I can use: (float)rand()

> But how could I get numbers between the ranges -5 and 20 lets say?

float GetRandomRange( float nFirst, float nSecond )
{
     return nFirst + (nSecond-nFirst)*( ((float)rand()) / ((float)RAND_MAX) );
}

Hope That Helps,
Dex*
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by:lost_bits1110
ID: 9765699
Thaaaaaaaaaaaanx..!
It works..
How'd you figure that out so fast?????!
I'll get there one day.......
:s
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LVL 19

Expert Comment

by:Dexstar
ID: 9765739
> How'd you figure that out so fast?????!

Practice!  :)

Dex*
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