科学计算器.txt

科学计算器源程序用javascript编写

 
 
科学计算器（1）

<SCRIPT language=javascript> 
<!-- 
var endNumber=true 
var mem=0 
var carry=10 
var hexnum="0123456789abcdef" 
var angle="d" 
var stack="" 
var level="0" 
var layer=0 


//数字键 

function inputkey(key) 
{ 
var index=key.charCodeAt(0); 
if ((carry==2 && (index==48 || index==49)) 
|| (carry==8 && index>=48 && index<=55) 
|| (carry==10 && (index>=48 && index<=57 || index==46)) 
|| (carry==16 && ((index>=48 && index<=57) || (index>=97 && index<=102)))) 
if(endNumber) 
{ 
endNumber=false 
document.calc.display.value = key 
} 
else if(document.calc.display.value == null || document.calc.display.value == "0") 
document.calc.display.value = key 
else 
document.calc.display.value += key 
} 

function changeSign() 
{ 
if (document.calc.display.value!="0") 
if(document.calc.display.value.substr(0,1) == "-") 
document.calc.display.value = document.calc.display.value.substr(1) 
else 
document.calc.display.value = "-" + document.calc.display.value 
} 

//函数键 

function inputfunction(fun,shiftfun) 
{ 
endNumber=true 
if (document.calc.shiftf.checked) 
document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry) 
else 
document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry) 
document.calc.shiftf.checked=false 
document.calc.hypf.checked=false 
inputshift() 
} 

function inputtrig(trig,arctrig,hyp,archyp) 
{ 
if (document.calc.hypf.checked) 
inputfunction(hyp,archyp) 
else 
inputfunction(trig,arctrig) 
} 


//运算符 

function operation(join,newlevel) 
{ 
endNumber=true 
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value 
while (newlevel!=0 && (newlevel<=(level.charAt(level.length-1)))) 
{ 
temp=parse(temp) 
level=level.slice(0,-1) 
} 
if (temp.match(/^(.*\d[\+\-\*\/\%\^\&\|x])?([+-]?[0-9a-f\.]+)$/)) 
document.calc.display.value=RegExp.$2 
stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join 
document.calc.operator.value=" "+join+" " 
level=level+newlevel 

} 

//括号 

function addbracket() 
{ 
endNumber=true 
document.calc.display.value=0 
stack=stack+"(" 
document.calc.operator.value=" " 
level=level+0 

layer+=1 
document.calc.bracket.value="(="+layer 
} 

function disbracket() 
{ 
endNumber=true 
var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value 
while ((level.charAt(level.length-1))>0) 
{ 
temp=parse(temp) 
level=level.slice(0,-1) 
} 

document.calc.display.value=temp 
stack=stack.substr(0,stack.lastIndexOf("(")) 
document.calc.operator.value=" " 
level=level.slice(0,-1) 

layer-=1 
if (layer>0) 
document.calc.bracket.value="(="+layer 
else 
document.calc.bracket.value="" 
} 

//等号 

function result() 
{ 
endNumber=true 
while (layer>0) 
disbracket() 
var temp=stack+document.calc.display.value 
while ((level.charAt(level.length-1))>0) 
{ 
temp=parse(temp) 
level=level.slice(0,-1) 
} 

document.calc.display.value=temp 
document.calc.bracket.value="" 
document.calc.operator.value="" 
stack="" 
level="0" 
} 


//修改键 

function backspace() 
{ 
if (!endNumber) 
{ 
if(document.calc.display.value.length>1) 
document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1) 
else 
document.calc.display.value=0 
} 
} 

function clearall() 
{ 
document.calc.display.value=0 
endNumber=true 
stack="" 
level="0" 
layer="" 
document.calc.operator.value="" 
document.calc.bracket.value="" 
} 


//转换键 

function inputChangCarry(newcarry) 
{ 
endNumber=true 
document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry)) 
carry=newcarry 

document.calc.sin.disabled=(carry!=10) 
document.calc.cos.disabled=(carry!=10) 
document.calc.tan.disabled=(carry!=10) 
document.calc.bt.disabled=(carry!=10) 
document.calc.pi.disabled=(carry!=10) 
document.calc.e.disabled=(carry!=10) 
document.calc.kp.disabled=(carry!=10) 

document.calc.k2.disabled=(carry<=2) 
document.calc.k3.disabled=(carry<=2) 
document.calc.k4.disabled=(carry<=2) 
document.calc.k5.disabled=(carry<=2) 
document.calc.k6.disabled=(carry<=2) 
document.calc.k7.disabled=(carry<=2) 
document.calc.k8.disabled=(carry<=8) 
document.calc.k9.disabled=(carry<=8) 
document.calc.ka.disabled=(carry<=10) 
document.calc.kb.disabled=(carry<=10) 
document.calc.kc.disabled=(carry<=10) 
document.calc.kd.disabled=(carry<=10) 
document.calc.ke.disabled=(carry<=10) 
document.calc.kf.disabled=(carry<=10) 



} 

function inputChangAngle(angletype) 
{ 
endNumber=true 
angle=angletype 
if (angle=="d") 
document.calc.display.value=radiansToDegress(document.calc.display.value) 
else 
document.calc.display.value=degressToRadians(document.calc.display.value) 
endNumber=true 
} 

function inputshift() 
{ 
if (document.calc.shiftf.checked) 
{ 
document.calc.bt.value="deg " 
document.calc.ln.value="exp " 
document.calc.log.value="expd" 

if (document.calc.hypf.checked) 
{ 
document.calc.sin.value="ahs " 
document.calc.cos.value="ahc " 
document.calc.tan.value="aht " 
} 
else 
{ 
document.calc.sin.value="asin" 
document.calc.cos.value="acos" 
document.calc.tan.value="atan" 
} 

document.calc.sqr.value="x^.5" 
document.calc.cube.value="x^.3" 

document.calc.floor.value="小数" 
} 
else 
{ 
document.calc.bt.value="d.ms" 
document.calc.ln.value=" ln " 
document.calc.log.value="log " 

if (document.calc.hypf.checked) 
{ 
document.calc.sin.value="hsin" 
document.calc.cos.value="hcos" 
document.calc.tan.value="htan" 
} 
else 
{ 
document.calc.sin.value="sin " 
document.calc.cos.value="cos " 
document.calc.tan.value="tan " 
} 

document.calc.sqr.value="x^2 " 
document.calc.cube.value="x^3 " 

document.calc.floor.value="取整" 
} 

} 
 科学计算器源代码（2）

//存储器部分 

function clearmemory() 
{ 
mem=0 
document.calc.memory.value=" " 
} 

function getmemory() 
{ 
endNumber=true 
document.calc.display.value=decto(mem,carry) 
} 

function putmemory() 
{ 
endNumber=true 
if (document.calc.display.value!=0) 
{ 
mem=todec(document.calc.display.value,carry) 
document.calc.memory.value=" M " 
} 
else 
document.calc.memory.value=" " 
} 

function addmemory() 
{ 
endNumber=true 
mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry)) 
if (mem==0) 
document.calc.memory.value=" " 
else 
document.calc.memory.value=" M " 
} 

function multimemory() 
{ 
endNumber=true 
mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry)) 
if (mem==0) 
document.calc.memory.value=" " 
else 
document.calc.memory.value=" M " 
} 

//十进制转换 

function todec(num,oldcarry) 
{ 
if (oldcarry==10 || num==0) return(num) 
var neg=(num.charAt(0)=="-") 
if (neg) num=num.substr(1) 
var newnum=0 
for (var index=1;index<=num.length;index++) 
newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1)) 
if (neg) 
newnum=-newnum 
return(newnum) 
} 

function decto(num,newcarry) 
{ 
var neg=(num<0) 
if (newcarry==10 || num==0) return(num) 
num=""+Math.abs(num) 
var newnum="" 
while (num!=0) 
{ 
newnum=hexnum.charAt(num%newcarry)+newnum 
num=Math.floor(num/newcarry) 
} 
if (neg) 
newnum="-"+newnum 
return(newnum) 
} 

//表达式解析 

function parse(string) 
{ 
if (string.match(/^(.*\d[\+\-\*\/\%\^\&\|x\<])?([+-]?[0-9a-f\.]+)([\+\-\*\/\%\^\&\|x\<])([+-]?[0-9a-f\.]+)$/)) 
return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4)) 
else 
return(string) 
} 

//数学运算和位运算 

function cypher(left,join,right) 
{ 
left=todec(left,carry) 
right=todec(right,carry) 
if (join=="+") 
return(decto(parseFloat(left)+parseFloat(right),carry)) 
if (join=="-") 
return(decto(left-right,carry)) 
if (join=="*") 
return(decto(left*right,carry)) 
if (join=="/" && right!=0) 
return(decto(left/right,carry)) 
if (join=="%") 
return(decto(left%right,carry)) 
if (join=="&") 
return(decto(left&right,carry)) 
if (join=="|") 
return(decto(left|right,carry)) 
if (join=="^") 
return(decto(Math.pow(left,right),carry)) 
if (join=="x") 
return(decto(left^right,carry)) 
if (join=="<") 
return(decto(left<<right,carry)) 
alert("除数不能为零") 
return(left) 
} 

//函数计算 

function funcalc(fun,num) 
{ 
with(Math) 
{ 
if (fun=="pi") 
return(PI) 
if (fun=="e") 
return(E) 

if (fun=="abs") 
return(abs(num)) 
if (fun=="ceil") 
return(ceil(num)) 
if (fun=="round") 
return(round(num)) 

if (fun=="floor") 
return(floor(num)) 
if (fun=="deci") 
return(num-floor(num)) 


if (fun=="ln" && num>0) 
return(log(num)) 
if (fun=="exp") 
return(exp(num)) 
if (fun=="log" && num>0) 
return(log(num)*LOG10E) 
if (fun=="expdec") 
return(pow(10,num)) 


if (fun=="cube") 
return(num*num*num) 
if (fun=="cubt") 
return(pow(num,1/3)) 
if (fun=="sqr") 
return(num*num) 
if (fun=="sqrt" && num>=0) 
return(sqrt(num)) 

if (fun=="!") 
return(factorial(num)) 

if (fun=="recip" && num!=0) 
return(1/num) 

if (fun=="dms") 
return(dms(num)) 
if (fun=="deg") 
return(deg(num)) 

if (fun=="~") 
return(~num) 

if (angle=="d") 
{ 
if (fun=="sin") 
return(sin(degressToRadians(num))) 
if (fun=="cos") 
return(cos(degressToRadians(num))) 
if (fun=="tan") 
return(tan(degressToRadians(num))) 

if (fun=="arcsin" && abs(num)<=1) 
return(radiansToDegress(asin(num))) 
if (fun=="arccos" && abs(num)<=1) 
return(radiansToDegress(acos(num))) 
if (fun=="arctan") 
return(radiansToDegress(atan(num))) 
} 
else 
{ 
if (fun=="sin") 
return(sin(num)) 
if (fun=="cos") 
return(cos(num)) 
if (fun=="tan") 
return(tan(num)) 

if (fun=="arcsin" && abs(num)<=1) 
return(asin(num)) 
if (fun=="arccos" && abs(num)<=1) 
return(acos(num)) 
if (fun=="arctan") 
return(atan(num)) 
} 

if (fun=="hypsin") 
return((exp(num)-exp(0-num))*0.5) 
if (fun=="hypcos") 
return((exp(num)+exp(-num))*0.5) 
if (fun=="hyptan") 
return((exp(num)-exp(-num))/(exp(num)+exp(-num))) 

if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan") 
{ 
alert("对不起,公式还没有查到!") 
return(num) 
} 

alert("超出函数定义范围") 
return(num) 
} 
} 

function factorial(n) 
{ 
n=Math.abs(parseInt(n)) 
var fac=1 
for (;n>0;n-=1) 
fac*=n 
return(fac) 
} 

function dms(n) 
{ 
var neg=(n<0) 
with(Math) 
{ 
n=abs(n) 
var d=floor(n) 
var m=floor(60*(n-d)) 
var s=(n-d)*60-m 
} 
var dms=d+m/100+s*0.006 
if (neg) 
dms=-dms 
return(dms) 
} 

function deg(n) 
{ 
var neg=(n<0) 
with(Math) 
{ 
n=abs(n) 
var d=floor(n) 
var m=floor((n-d)*100) 
var s=(n-d)*100-m 
} 
var deg=d+m/60+s/36 
if (neg) 
deg=-deg 
return(deg) 
} 

function degressToRadians(degress) 
{ 
return(degress*Math.PI/180) 
} 

function radiansToDegress(radians) 
{ 
return(radians*180/Math.PI) 
} 

//界面 

//--> 
</SCRIPT>