javascript算法集：金额转大写

function money2Chinese(num) {

if(typeof num) throw new Error('参数为数字')

let strOutput = ""

let strUnit = '仟佰拾亿仟佰拾万仟佰拾元角分'

num += "00"

const intPos = num.indexOf('.')

if (intPos >= 0) {

num = num.substring(0, intPos) + num.substr(intPos + 1, 2)

}

strUnit = strUnit.substr(strUnit.length - num.length)

for (let i = 0; i < num.length; i++) {

strOutput += '零壹贰叁肆伍陆柒捌玖'.substr(num.substr(i, 1), 1) + strUnit.substr(i, 1)

}

return strOutput.replace(/零角零分$/, '整').replace(/零[仟佰拾]/g, '零').replace(/零{2,}/g, '零').replace(/零([亿|万])/g, '$1').replace(/零+元/, '元').replace(/亿零{0,3}万/, '亿').replace(/^元/, "零元");

}