How can i define a variable in a permanent data type ?

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Antoine
Antoine 2013-12-6
回答： Image Analyst 2013-12-6
Hi, i'm working with some 16 bits integers and I am looking for a way to define their datatype permanently, because for now I'm using the int16() converting function every time my variable needs to be reassigned.
Example : (Uc1 & Er are int16 typed)
Uc1 = int16(1000*Uc1 + 536*Er);
would become (if variables are permanently typed)
Uc1 = 1000*Uc1 + 536*Er;
Thanks

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回答（1 个）

Image Analyst
Image Analyst 2013-12-6
If Er and Uc1 (incoming) are int16, then Uc1 will still be int16 afterwards. Just try it
Er = int16(11);
Uc1 = int16(33);
Uc1 = 1000*Uc1 + 536*Er
whos Uc1
But be aware that you're multiplying by some pretty big numbers and it could be possible (for some values of Uc1 and Er) to exceed the 32767 limit for int16 and get clipped to that value. So you might want to make Uc1 double so you don't get clipping.

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