mathematic instruction using random

[dreamvig]

Hi,
i have some mathematic instruction to resolve

|z - c| =< r and|z - w| =< d

because i want just one number , i used randomise

 mini =min((d-w),(c-r));

   maxi=max((d+w),(r+c));
   
   z=mini + (rand()%(maxii - minii));

it give me ranom number but when i use it to calculate another

f=sqrt(pow(d,2)-pow((z-w),2));

it give me error because many times the "z"is very hight
so i get negative inter the sqrt
how i resolve this problem ? shall i add another limit to the Z?

[tabstop]

Why do you have both maxi and maxii? What's the value of maxii?

[dreamvig]

Why do you have both maxi and maxii? What's the value of maxii?

oups , i made error , it's the same maxii=maxi

[tabstop]

So if I understand you right, if r+c > d+w you don't want to go as high as r+c, because that would make |z-w| > d. So you would in fact want the smaller of those two numbers....