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what is the best method to convert a double value back into a real data type ? 


 

var
x : double ;
y : real ;


y: = x ;

 

what are  the risk's ? 

 

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Posted (edited)

Given this definition

type Real = Double;

I'd say you don't have much to fear.

 

Of course, this code doesn't compile.

1 hour ago, bernhard_LA said:

y: = x ;

Edited by David Heffernan
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I believe the old Turbo Pascal "Real" type is now called Real48 and exists only for compatibility purposes (i.e. if you need to read or write files with data in that format).  It is much slower than either Double or Single because it's not a native FPU format.

 

 

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