数字转化为大写金额

结果：

/** *  * @param {*} n 数字  * @returns  */const digitUppercase = (n) => {    const fraction = ['角', '分'];    const digit = [        '零', '壹', '贰', '叁', '肆',        '伍', '陆', '柒', '捌', '玖'    ];    const unit = [        ['元', '万', '亿'],        ['', '拾', '佰', '仟']    ];    n = Math.abs(n);    let s = '';    for (let i = 0; i < fraction.length; i++) {        s += (digit[Math.floor(n * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '');    }    s = s || '整';    n = Math.floor(n);    for (let i = 0; i < unit[0].length && n > 0; i++) {        let p = '';        for (let j = 0; j < unit[1].length && n > 0; j++) {            p = digit[n % 10] + unit[1][j] + p;            n = Math.floor(n / 10);        }        s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s;    }    return s.replace(/(零.)*零元/, '元')        .replace(/(零.)+/g, '零')        .replace(/^整$/, '零元整');};console.log(digitUppercase('520'))