Help with calculating

This is a discussion on Help with calculating within the Windows Programming forums, part of the Platform Specific Boards category; i am making a program that's calculate Meters Per Second into Kilometers Per Hour.. i used this piece of code ...

  1. #1
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    Help with calculating

    i am making a program that's calculate Meters Per Second into Kilometers Per Hour.. i used this piece of code to do the calculate:

    Code:
    void __fastcall Tmpstokmph::calculate(TObject *Sender)
    {
    kmph->Text = FloatToStrF((StrToFloat (mps * 60) * 60) / 1000, ffNumber, 4 , 10);
    }
    But if i compile it it's say: Illigel use of pointers.

    I can't solve it.. can any1 help me plz? (For if u need some info, i just started the Windows C++)

    PS: kmph and mps are both names of text fields, so u know it

  2. #2
    Tropical Coder Darryl's Avatar
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    edit: I didn't see your last line, so mps is text

    (StrToFloat (mps)* 60 * 60)/1000 ...

    You can't multiply text by a number as you did ( mps * 60)
    Last edited by Darryl; 08-04-2005 at 10:08 AM.

  3. #3
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    nope that's not it, because i want the mps variable multiplies with 60, and that answer must be multiplied with 60, and that answer must be divided by 1000

  4. #4
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    oh, finally my dad helpd me, the thing in the Bold is the thing i forgot
    Code:
    void __fastcall Tmpstokmph::calculate(TObject *Sender)
    {
    kmph->Text = FloatToStrF((StrToFloat (mps->Text * 60) * 60) / 1000, ffNumber, 4 , 10);
    }

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