max function

[Maurader]

is there a function that will return the max of two doubles?

Thanks

 

[Zyrenthian]

Floating point comparisons can be tricky. They are handled differently. I would suggest that you choose to what decimal place you want to be accurate to. For example, if I wanted to know if

double a = 1.902456;
double b = 1.902478;

if(a==b)

and I only cared about 3 decimal places here is what I would do.

int val1 = (int)(a*1000);
int val2 = (int)(b*1000);

NOTICE The parens... just make sure you cast appropriately.

then

val1+= ((int)(a*10000))%10 >=5 ? 1:0;
val2+= ((int)(a*10000))%10 >=5 ? 1:0;

return val1 == val2

In this case it will return true;

if b was = to 1.902578, val2 would be rounded up to 1903 and this would return false.


Matt

 

[Guest_imported]

I haven't found one. The easiest way would be to write your own.

double MaxDouble(double num1, double num2)
{
If(num1 > num2)
return num1;
return num2;
}

 

[Maurader]

that is pretty sad...hehe

 

[Zyrenthian]

Sorry... i returned true or false above...

should be

if(val1<val2)
return val2;
return val1;

Matt

 

[Zyrenthian]

oops again... i meant
if(val1<val2)
return a;
return b;