<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <body> <script type="text/javascript"> /** * 乘法 * @param arg1 * @param arg2 * @returns {Number} */ function accMul(arg1, arg2) { var m = 0, s1 = arg1.toString(), s2 = arg2.toString(); try { m += s1.split(".")[1].length } catch(e) {} try { m += s2.split(".")[1].length } catch(e) {} return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m) } /** * 除法 * @param arg1 * @param arg2 * @returns {Number} */ function accDiv(arg1, arg2) { var t1 = 0, t2 = 0, r1, r2; try { t1 = arg1.toString().split(".")[1].length } catch(e) {} try { t2 = arg2.toString().split(".")[1].length } catch(e) {} with(Math) { r1 = Number(arg1.toString().replace(".", "")) r2 = Number(arg2.toString().replace(".", "")) return(r1 / r2) * pow(10, t2 - t1); } } /** * 加法 * @param arg1 * @param arg2 * @returns {Number} */ function accAdd(arg1, arg2) { var r1, r2, m, c; try { r1 = arg1.toString().split(".")[1].length } catch(e) { r1 = 0 } try { r2 = arg2.toString().split(".")[1].length } catch(e) { r2 = 0 } c = Math.abs(r1 - r2); m = Math.pow(10, Math.max(r1, r2)) if(c > 0) { var cm = Math.pow(10, c); if(r1 > r2) { arg1 = Number(arg1.toString().replace(".", "")); arg2 = Number(arg2.toString().replace(".", "")) * cm; } else { arg1 = Number(arg1.toString().replace(".", "")) * cm; arg2 = Number(arg2.toString().replace(".", "")); } } else { arg1 = Number(arg1.toString().replace(".", "")); arg2 = Number(arg2.toString().replace(".", "")); } return(arg1 + arg2) / m } /** * 减法 * @param arg1 * @param arg2 * @returns */ function accSub(arg1, arg2) { var r1, r2, m, n; try { r1 = arg1.toString().split(".")[1].length } catch(e) { R1 = 0 } the try { R2 = arg2.toString (). Split ( " . " ) [ . 1 ] .length } the catch (E) { R2 = 0 } m = Math.pow ( 10 , Math.max (R1, R2 )); // Last Modify by deeka // dynamic control accuracy of length n-= (R1> = R2)? R1: R2; return ((m * arg1 - arg2 * m) / m) .toFixed (n-); } The console.log (accMul ( 7.88 , 0.8 ) + ' --7.88 ------ * 0.8 multiplication ' ); // multiply the console.log (accDiv ( 7.88 , 0.8 ) + ' --7.88 / 0.8-- ---- division ' ); // divide the console.log (accAdd ( 7.88 , 0.8 ) + ' --7.88 + 0.8 ------ adder ' ); // adding the console.log (accSub ( 7.88 , 0.8 ) + ' --7.88-0.8 ------ subtractor ' ); // subtraction </script> </body> </html>
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