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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!

Parents
  • 0 in reply to Zhi Chen

    "the C compiler will be smart enought to optimize "all" redundency."

    You'd hope so, wouldn't you?

    I did once come across a compiler (not 8051; not Keil; someone beginning with 'I') which did produce different results if you used "unnecessary" parentheses!

    But then their assembler produced the same opcode for both the "Jump If Equal" and "Jump If Not Equal" mnemonics!!

Reply
  • 0 in reply to Zhi Chen

    "the C compiler will be smart enought to optimize "all" redundency."

    You'd hope so, wouldn't you?

    I did once come across a compiler (not 8051; not Keil; someone beginning with 'I') which did produce different results if you used "unnecessary" parentheses!

    But then their assembler produced the same opcode for both the "Jump If Equal" and "Jump If Not Equal" mnemonics!!

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