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Stefan
Landsberg | Hi,
i want one Program write, that The Quadratwurzel a number accounts.
ABER it should not 6 Nachkommastellen rounds, separate as long as go on To one on Stop clicking.
question:
(How) can the curtail on 6 Nachkommastellen with sqrt() and pow() turn off.
If not goes, then must I me ever a procedure dreamup The that power.
but Please no Fertiglösung post. then learn I nothing.
another question:
is in XProfan 10 The length one floats terminable? |
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Sebastian
Sprenger | Hello Stefan,
 question 1:
The functions Sqrt() and Pow() rounds quite nothing. The numbers are just To short displayed.
there's as a commands namens Decimals . with the can you to determine, wieviele Nachkommastellen showing should (on this place verweise I you time on The XProfan-Help  ).
question 2:
Floats can in the principle infinite long his, only The undertow. "Rechengenauigkeit" is on 15 to put terminable.
with others Worten: If you a number have, The over 15 Digits long is (alike whether Nachkommastellen or no), can it occur, that bills or Results ex the 16. place inaccurate go.
I geb you time one small example:
by me comes 0.33333333333333298 with etlichen nobodies out. the first 15 Digits voices means, ex the 16. place is correct not plenty. 
so, enough learnt? 
Greeting, Sebastian |
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| Profan² 7.0e, XProfan 9, 11.2a, FreeProfan32 Windows Vista Home Premium 32-Bit, 2.8 Ghz, 4 GB RAM Windows Me, 1.8 Ghz, 256 MB RAM | 08/15/08 ▲ |
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Jac
de
Lad |
Floats can in the principle infinite long his,
the is correct not...
only The undertow. "Rechengenauigkeit" is on 15 to put terminable.
...and so is a Float NIEMALS infinite long. Also is only one bestimmter area allows (I faith the smallest is 1*10^-43xx or so). small numbers then neither accepted.
there's Algorithms, with them You The root always moreover to charge let can. want You only The 2. root or should each arbitrary n-th root berechenbar his? I could time look, whether I what there have...
Jac  |
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| Profan² 2.6 bis XProfan 11.1+XPSE+XPIA+XPRR (und irgendwann XIDE)
Core2Duo E8500/T2250, 8192/1024 MB, Radeon HD4850/Radeon XPress 1250, Vista64/XP | 08/15/08 ▲ |
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Stefan
Landsberg | I Have jetz already a little bit rumprobiert.
somehow komm I do not so correctly. forth because my Program not power I wants.
@sebastian:
thanks for speedy response. but by me can I with decimals but too only To 35 weg. More nachkommastellen go not displayed.
if float only To to 15ten place exactly is it in this case useless for me.
@Jac
i want first only The 2. means The Quadratwurzel to charge. (we've the theme strain in the school, deshlab come so did i on The Idea for so one Program).
I have already on it virtual something To write what a place to the others accounts. the would namely very the I having wished.
i know only not yet where I begin should.
would be it To plenty desires if You (if You so a Algorithmus have) not whom whole code postest separate only Tipps Gibts with whom command the To release is and the groben construction describe? otherwise is the program Yes not of me
@all
I have as ausgabefeld for the Result one multiedit taken.
is the for spending of numbers suitable or there what better?
alas Yes. so sees the from I currently have. it'll but quite nothing calculated. separate only The number from the eingabefeld übernommen: [...]  |
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Jac
de
Lad | No, No, No! Typischer Anfängerfehler. circa with the Inputs To calculate must You it first of String one Float transfiguring (see "Val()") and to spending in the MultiEdit again in a String (see "Str$()").
Declare
declare in&,out&,btn&,Result$,end%,input$
Window create
windowstyle 575
windowtitle "Quadratwurzel"
window 20,20 - 600,400
usefont "MS Sans Serif",20,0,0,0,0
Window style
in&=create("Edit",%hWnd,"25",5,5,580,20)
btn&=create("button",%hWnd,"Berechnen",250,30,100,30)
out&=create("multiedit",%hWnd,"",5,65,580,-270)
whilenot end%
WaitInput
case %key=2 : break
if clicked(btn&)
input$=gettext$(in&)
Result$=Str $(sqrt(Val(input$)))
settext out&,""
settext out&,Result$
endif
endwhile
Kürzer would your Prog so:
Declare
declare in&,out&,btn&,end%
Window create
windowstyle 575
windowtitle "Quadratwurzel"
window 20,20 - 600,400
usefont "MS Sans Serif",20,0,0,0,0
Window style
in&=create("Edit",%hWnd,"25",5,5,580,20)
btn&=create("button",%hWnd,"Berechnen",250,30,100,30)
out&=create("multiedit",%hWnd,"",5,65,580,-270)
whilenot end%
WaitInput
if %key=2
break
elseif clicked(btn&)
settext out&,Str $(sqrt(Val(gettext$(in&))))
endif
endwhile
to that Topic Berechnung:
You can either each place particular to charge let or a number quadrieren and depending on whether tappt im dunkeln To big or To small is always a little bit raise or take away. moreover must You the numbers in Strings Save and each place particular multiplizieren.
Jac |
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| Profan² 2.6 bis XProfan 11.1+XPSE+XPIA+XPRR (und irgendwann XIDE)
Core2Duo E8500/T2250, 8192/1024 MB, Radeon HD4850/Radeon XPress 1250, Vista64/XP | 08/15/08 ▲ |
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Stefan
Landsberg | Hi,
I take for spending the ergebnisses one simple editfeld, but since I in my Program Yes on The available number always The recalculated place dranhängen wants, is it in my opinion unpraktisch and probably too too slow always first whom actually Text with gettext from the editfeld auszulesen, a new digit dranzuhängen, and then again The number with settext in that editfeld To write.
Gibts there a better method or irgendeine message (Gibts a Page/File in the The messages on german declared are) ? |
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 | | wm_copyData could you here help. |
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Stefan
Landsberg | Hello,
thanks first but there somewhere ne Documentation in the The messages verständlich (best german) declared are?
I look with msdn not so correctly. through! |
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| | clear, XProfan.com Search and google are The aide in such hardship! |
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Stefan
Landsberg | after I jetz finally again little time for XProfan found Have (school claim ne whole crowd time. particularly latein  )
place I time again a question:
Why we in the if request no worth on The variable firstpart$ transfer?
I Have already attempts tappt im dunkeln as integer To declarieren. goes neither:
Declare
declare in&,out&,calcbtn&,stopbtn&,Result$,end%,input$
PROC-part
Proc sqrtlong
Algorithmus to that wander of/ one Quadratwurzel
Parameters number$, output&, stopbtn&
declare vorkomma$, div2%, firstsqrt%, firstpart$
number$=translate $(number$, "," , ".") Dezimalkomma through Dezimalpunkt supplant
vorkomma$=substr$(number$,1,".") Digits to the comma in vorkomma$ Save
div2%=Instr(".",st$(substr$(len(vorkomma$ / 2),1,"."))) Verify whether The amount the Digits to the comma straight or ungerade is.
if div2% = 0
firstpart$=mid$(vorkomma$,0,2) first 2 Digits from vorkomma$ go in firstpart$ stored
firstsqrt%=substr$(st$(sqrt(val(firstpart$))), 1 , ".") it becomes The sqrt from firstpart$ formed (remainder becomes omitted)
else
firstpart$=mid$(vorkomma$,0,1) first digit from vorkomma$ becomes in firstpart$ stored
firstsqrt%=substr$(st$(sqrt(val(firstpart$))), 1 , ".") it becomes The sqrt from firstpart$ formed (remainder becomes omitted)
endif
locate 4,1 only to that testing what firstpart$ enhält
print "firstpart:",firstpart$ only to that Test what firstpart$ enhält
sendmessage(output&,$004A,%hWnd,Addr(firstsqrt%))
endproc
Window create
windowstyle 575
windowtitle "Quadratwurzel"
window 20,20 - 600,125
usefont "MS Sans Serif",20,0,0,0,0
Window style
in&=create("Edit",%hWnd,"25,5",5,5,580,20)
calcbtn&=create("button",%hWnd,"Berechnen",170,30,100,30)
stopbtn&=create("button",%hWnd,"Stop",310,30,100,30)
out&=create("Edit",%hWnd,"",5,65,580,20)
whilenot end%
WaitInput
case %key=2 : break
if clicked(calcbtn&)
sqrtlong gettext$(in&), out&, stopbtn&
endif
endwhile
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| | The second Parameter of Mid$ must at least 1 his if one objectively ex first position detect would like. |
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Stefan
Landsberg | ahhh,
thanks (Why be I there not self on it come  ) |
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