-
/**
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* 乘法
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* @param arg1
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* @param arg2
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* @returns {Number}
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*/
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function accMul(arg1, arg2) {
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var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
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try { m += s1.split(".")[1].length } catch (e) { }
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try { m += s2.split(".")[1].length } catch (e) { }
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return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)
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}
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/**
-
* 除法
-
* @param arg1
-
* @param arg2
-
* @returns {Number}
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*/
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function accDiv(arg1, arg2) {
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var t1 = 0, t2 = 0, r1, r2;
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try { t1 = arg1.toString().split(".")[1].length } catch (e) { }
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try { t2 = arg2.toString().split(".")[1].length } catch (e) { }
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with (Math) {
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r1 = Number(arg1.toString().replace(".", ""))
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r2 = Number(arg2.toString().replace(".", ""))
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return (r1 / r2) * pow(10, t2 - t1);
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}
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}
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/**
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* 加法
-
* @param arg1
-
* @param arg2
-
* @returns {Number}
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*/
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function accAdd(arg1, arg2) {
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var r1, r2, m, c;
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try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
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try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
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c = Math.abs(r1 - r2);
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m = Math.pow(10, Math.max(r1, r2))
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if (c > 0) {
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var cm = Math.pow(10, c);
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if (r1 > r2) {
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arg1 = Number(arg1.toString().replace(".", ""));
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arg2 = Number(arg2.toString().replace(".", "")) * cm;
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}
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else {
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arg1 = Number(arg1.toString().replace(".", "")) * cm;
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arg2 = Number(arg2.toString().replace(".", ""));
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}
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}
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else {
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arg1 = Number(arg1.toString().replace(".", ""));
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arg2 = Number(arg2.toString().replace(".", ""));
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}
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return (arg1 + arg2) / m
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}
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/**
-
* 减法
-
* @param arg1
-
* @param arg2
-
* @returns
-
*/
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function accSub(arg1,arg2){
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var r1,r2,m,n;
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try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
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try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
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m=Math.pow(10,Math.max(r1,r2));
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//last modify by deeka
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//动态控制精度长度
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n=(r1>=r2)?r1:r2;
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return ((arg1*m-arg2*m)/m).toFixed(n);
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}
调用示例
alert(accMul(7.88,0.8));//乘法
alert(accDiv(7.88,0.8).toFixed(2));//除法
alert(accAdd(7.88,0.8));//加法
alert(accSub(7.88,0.8));//减法 |
