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Inacurate precision truncating.

Zhi Chen

Hi folk,
I have

u16 wTemp = 0;
fsingle fTemp = 17.5123;

wTemp = (u16)fTemp;
Somehow, the wTemp is 17. Technically, the wTemp should be 18, do anybody know what do I have to do for the compiler in order to generate more precise data conversion???

Thanks!

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  • 0

    "Technically, the wTemp should be 18"

    No; 17 is correct: "When a value of floating type is converted to integral type, the fractional part is discarded" [1] (my emphasis).

    That's precisely what "truncate" means!

    [1] Appendix A, K&R, "The C Programming Language, 2/ed"

Reply
  • 0

    "Technically, the wTemp should be 18"

    No; 17 is correct: "When a value of floating type is converted to integral type, the fractional part is discarded" [1] (my emphasis).

    That's precisely what "truncate" means!

    [1] Appendix A, K&R, "The C Programming Language, 2/ed"

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