加法:
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function numAdd(num1, num2) {
var baseNum, baseNum1, baseNum2;
try {
baseNum1 = num1.toString().split( "." )[1].length;
} catch (e) {
baseNum1 = 0;
}
try {
baseNum2 = num2.toString().split( "." )[1].length;
} catch (e) {
baseNum2 = 0;
}
baseNum = Math.pow(10, Math.max(baseNum1, baseNum2));
return (num1 * baseNum + num2 * baseNum) / baseNum;
}; |
减法:
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function numSub(num1, num2) {
var baseNum, baseNum1, baseNum2;
var precision; // 精度
try {
baseNum1 = num1.toString().split( "." )[1].length;
} catch (e) {
baseNum1 = 0;
}
try {
baseNum2 = num2.toString().split( "." )[1].length;
} catch (e) {
baseNum2 = 0;
}
baseNum = Math.pow(10, Math.max(baseNum1, baseNum2));
precision = (baseNum1 >= baseNum2) ? baseNum1 : baseNum2;
return ((num1 * baseNum - num2 * baseNum) / baseNum).toFixed(precision);
}; |
乘法:
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function numMulti(num1, num2) {
var baseNum = 0;
try {
baseNum += num1.toString().split( "." )[1].length;
} catch (e) {}
try {
baseNum += num2.toString().split( "." )[1].length;
} catch (e) {}
return Number(num1.toString().replace( "." , "" )) * Number(num2.toString().replace( "." , "" )) / Math.pow(10, baseNum);
}; |
除法:
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function numDiv(num1, num2) {
var baseNum1 = 0, baseNum2 = 0;
var baseNum3, baseNum4;
try {
baseNum1 = num1.toString().split( "." )[1].length;
} catch (e) {
baseNum1 = 0;
}
try {
baseNum2 = num2.toString().split( "." )[1].length;
} catch (e) {
baseNum2 = 0;
}
with (Math) {
baseNum3 = Number(num1.toString().replace( "." , "" ));
baseNum4 = Number(num2.toString().replace( "." , "" ));
return (baseNum3 / baseNum4) * pow(10, baseNum2 - baseNum1);
}
}; |
本文转自 爱笑嘚蛋蛋 51CTO博客,原文链接:http://blog.51cto.com/dd118/1889702,如需转载请自行联系原作者