JS floating-point calculation problem + amount capitalization conversion

a JS floating point calculation problem solution:

1. Using the numberobject.tofixed (num) method

The ToFixed () method rounds numbers to a number that specifies the number of decimal digits.

2. Calculate floating-point numbers more accurately

Note: the addition of JavaScript will have an error, and it will be more obvious when the two floating-point numbers are added.  This function returns a more accurate addition result.      Call: Accadd (ARG1,ARG2)//return value: Arg1 plus arg2 's exact result function Accadd (arg1, arg2) {var r1, R2, M; try {r1 = (1 * arg1). toString (). Split (".")      [1].length;      } catch (e) {r1 = 0; try {r2 = (1 * arg2). toString (). Split (".")      [1].length;      } catch (e) {r2 = 0;      } m = Math.pow (Ten, Math.max (R1, r2));  Return (ARG1 * m + arg2 * m)/m; }//Description: JavaScript subtraction results are error-evident when the two floating-point numbers are added together.  This function returns a more accurate subtraction result.  Call: Accsub (ARG1,ARG2)//return value: arg1 reduce the exact result of arg2 function accsub (arg1, arg2) {return Accadd (arg1,-ARG2); }//Description: The multiplication result of JavaScript will be error, it will be more obvious when two floating-point numbers are multiplied.  This function returns a more accurate multiplication result. Call: Accmul (ARG1,ARG2)//return value: Arg1 times the exact result of arg2 function Accmul (arg1, arg2) {var m = 0, S1 = (1 * arg1). ToString (      ), S2 = (1 * arg2). toString (); try {m + = S1.split (".")      [1].length; } catch (e) {} try {m + = s2.split (".")      [1].length;      } catch (e) {} var ss = number (S1.replace (".", "")) * Number (S2.replace (".", ""))/Math.pow (M);  Return Math.Round (SS * 100)/100; }//Description: The result of the division of JavaScript will be error, it will be more obvious when the two floating-point numbers divide.  This function returns a more accurate division result.      Call: Accdiv (ARG1,ARG2)//return value: Arg1 divided by the exact result of arg2 function Accdiv (arg1, arg2) {var t1 = 0, t2 = 0, R1, R2; try {t1 = (1 * arg1). toString (). Split (".")      [1].length; } catch (e) {} try {t2 = (1 * arg2). toString (). Split (".")      [1].length;          } catch (e) {} with (Math) {r1 = number ((1 * arg1). toString (). Replace (".", ""));          r2 = number ((1 * arg2). toString (). Replace (".", ""));          var ss = (R1/R2) * POW (ten, t2-t1);      Return Math.Round (SS * 100)/100; }  }

　　

Two-Amount capitalization conversion

Amount Case Conversion function convertcurrency (currencydigits) {//Constants:var maximum_number = 99999999999.99;  Predefine the radix characters and currency symbols for output:var Cn_zero = "0";  var cn_one = "one";  var cn_two = "Ii.";  var cn_three = "three";  var cn_four = "the premises";  var cn_five = "WU";  var cn_six = "Lu";  var cn_seven = "Qi";  var cn_eight = "ba";  var cn_nine = "JIU";  var Cn_ten = "Pick up";  var cn_hundred = "Bai";  var cn_thousand = "thousand";  var cn_ten_thousand = "million";  var cn_hundred_million = "billion";  var cn_symbol = "RMB";  var cn_dollar = "Yuan";  var cn_ten_cent = "angle";  var cn_cent = "min";    var Cn_integer = "whole"; Variables:var Integral;   represent integral part of digit number. var decimal;  represent decimal part of digit number. var outputcharacters;  The output result.  var parts;  var digits, radices, bigradices, decimals;  var Zerocount;  var i, p, D;    var quotient, modulus;  Validate Input string:currencydigits = currencydigits.tostring (); if (currencydigits = = "") {alert (" Empty input! ");  Return "";    } if (Currencydigits.match (/[^,.\d]/) = null) {alert ("Invalid characters in the input string!");  Return ""; } if ((CurrencyDigits). Match (/^ ((\d{1,3} (, \d{3}) * (. ( (\d{3},) *\d{1,3}))?) | (\d+ (. \d+)?))    $/) = = null) {alert ("illegal format of digit number!");  Return ""; }//Normalize The format of input digits:currencydigits = Currencydigits.replace (/,/g, "");  Remove comma delimiters. CurrencyDigits = Currencydigits.replace (/^0+/, "");   Trim Zeros at the beginning.  Assert the number is not greater than the maximum number.    if (number (currencydigits) > Maximum_number) {alert ("Too large a number to convert!");  Return ""; }//Http://www.knowsky.com/Process the coversion from currency digits to characters://separate integral and decimal  Parts before processing coversion:parts = Currencydigits.split (".");    if (Parts.length > 1) {integral = parts[0];    decimal = parts[1]; Cut down RedundaNT decimal digits that is after the second.  decimal = Decimal.substr (0, 2);    } else {integral = parts[0];  decimal = ""; }//Prepare the characters corresponding to the digits:digits = new Array (Cn_zero, Cn_one, Cn_two, Cn_three, Cn_four,  Cn_five, Cn_six, Cn_seven, cn_eight,cn_nine);  radices = new Array ("", Cn_ten, cn_hundred, Cn_thousand);  Bigradices = new Array ("", Cn_ten_thousand, cn_hundred_million);  decimals = new Array (cn_ten_cent, cn_cent);  Start processing:outputcharacters = "";    Process integral part if it is larger than 0:if (number (integral) > 0) {zerocount = 0;     for (i = 0; i < integral.length; i++) {p = integral.length-i-1;     D = Integral.substr (i, 1);     quotient = P/4;     modulus = p% 4;     if (d = = "0") {zerocount++;      } else {if (Zerocount > 0) {outputcharacters + = digits[0];      } zerocount = 0;     Outputcharacters + = Digits[number (d)] + radices[modulus]; } if (modulus = = 0 && Zerocount < 4) {outputcharacters + = bigradices[quotient];  }} outputcharacters + = Cn_dollar; }//Process decimal Part if there is:if (decimal! = "") {for (i = 0; i < decimal.length;     i++) {d = decimal.substr (i, 1);     if (d! = "0") {outputcharacters + = Digits[number (d)] + decimals[i]; }}}//Confirm and return the final output string:if (outputcharacters = = "") {outputcharacters = Cn_zero + C  N_dollar;  } if (decimal = = "") {outputcharacters + = Cn_integer;  }//outputcharacters = Cn_symbol + outputcharacters;  Outputcharacters = outputcharacters;  return outputcharacters;    }////Restore amount function Rmoney (s) {return parsefloat (S.replace (/[^\d\.-]/g, ""));      }//Amount totals formatted s for the parameter to be formatted (float type), n is the number of digits left after the decimal point function Fmoney (s,n) {n = n>0 && n<=20? N:2;      s = parsefloat ((s+ ""). Replace (/[^\d\.-]/g, ""). ToFixed (n) + ""; var L = s.split (".") [0].split (""). Reverse (),       r = S.split (".")       [1];      t = ""; for (i = 0;i<l.length;i++) {t+=l[i]+ ((i+1)%3==0 && (i+1)! = l.length?       "," : ""); } return T.split (""). Reverse (). Join ("") + "."  +r;      }

Reference: http://blog.csdn.net/fairyhawk/article/details/7274990

JS floating-point calculation problem + amount capitalization conversion