This is a little example about a JavaScript Calculator, he could calculate some simple things another solution is to use eval.
JavaScript code:
HTML code:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 |
var Wert = 0; var OP = ":"; function CalcPlus () { if(document.Eingabe.TB.value != ""&&OP!=":"){CalcErg();} switch(OP) { case "+": document.Eingabe.TB.value = 1*Wert+1*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "-": document.Eingabe.TB.value = Wert-document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "*": document.Eingabe.TB.value = Wert*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "/": document.Eingabe.TB.value = Wert/document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; default: Wert = document.Eingabe.TB.value; document.Eingabe.TB.value=""; } OP="+"; } function CalcMinus () { if(document.Eingabe.TB.value != ""&&OP!=":"){CalcErg();} switch(OP) { case "+": document.Eingabe.TB.value = 1*Wert+1*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "-": document.Eingabe.TB.value = Wert-document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "*": document.Eingabe.TB.value = Wert*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "/": document.Eingabe.TB.value = Wert/document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; default: Wert = document.Eingabe.TB.value; document.Eingabe.TB.value=""; } OP="-"; } function CalcMal () { if(document.Eingabe.TB.value != ""&&OP!=":"){CalcErg();} switch(OP) { case "+": document.Eingabe.TB.value = 1*Wert+1*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "-": document.Eingabe.TB.value = Wert-document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "*": document.Eingabe.TB.value = Wert*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "/": document.Eingabe.TB.value = Wert/document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; default: Wert = document.Eingabe.TB.value; document.Eingabe.TB.value=""; } OP="*"; } function CalcDiv () { if(document.Eingabe.TB.value != ""&&OP!=":"){CalcErg();} switch(OP) { case "+": document.Eingabe.TB.value = 1*Wert+1*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "-": document.Eingabe.TB.value = Wert-document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "*": document.Eingabe.TB.value = Wert*document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; case "/": document.Eingabe.TB.value = Wert/document.Eingabe.TB.value;document.Eingabe.TB.value="";OP=":"; break; default: Wert = document.Eingabe.TB.value; document.Eingabe.TB.value=""; } OP="/"; } function CalcErg () { switch(OP) { case "+": document.Eingabe.TB.value = 1*Wert+1*document.Eingabe.TB.value; break; case "-": document.Eingabe.TB.value = Wert-document.Eingabe.TB.value; break; case "*": document.Eingabe.TB.value = Wert*document.Eingabe.TB.value; break; case "/": document.Eingabe.TB.value = Wert/document.Eingabe.TB.value; break; default: document.Eingabe.TB.value=Wert; } OP=":"; Wert=document.Eingabe.TB.value; } function CalcClear () { document.Eingabe.TB.value ="";OP=":";Wert=0; } |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
<form name="Eingabe"> <input type="text" name="TB"> <br> <input type="button" onclick="javascript:CalcPlus()" value="+"> <input type="button" onclick="javascript:CalcMinus()" value="-"> <input type="button" onclick="javascript:CalcMal()" value="*"> <input type="button" onclick="javascript:CalcDiv()" value="/"> <input type="button" onclick="javascript:CalcErg()" value="="> <br> <input type="button" onclick="document.Eingabe.TB.value=Math.sqrt(document.Eingabe.TB.value)" value="sqrt"> <input type="button" onclick="document.Eingabe.TB.value=Math.sin(document.Eingabe.TB.value)" value="sin"> <input type="button" onclick="document.Eingabe.TB.value=Math.cos(document.Eingabe.TB.value)" value="cos"> <input type="button" onclick="document.Eingabe.TB.value=Math.tan(document.Eingabe.TB.value)" value="tan"> <br> <input type="button" onclick="document.Eingabe.TB.value=1/document.Eingabe.TB.value" value="1/x"> <input type="button" onclick="document.Eingabe.TB.value=document.Eingabe.TB.value*1e3" value="x*1k"> <input type="button" onclick="document.Eingabe.TB.value=document.Eingabe.TB.value*1e-3" value="x*1m"> <input type="button" onclick="document.Eingabe.TB.value=Math.PI" value="Pi"> <br> <input type="button" onclick="javascript:CalcClear()" value=" --< Clear >-- "> <br> </form> |
Everyone llves it when folks come together andd share opinions.
View CommentGreat blog, keep it up!
I used to be suggested this web site via my cousin. I am no longer positive whether or not this publish is written by means of him as nobody else realize such designated about my difficulty.
You’re incredible! Thanks!
Feel free to surf to my web page;
View Comment