SOURCE

function cAve(money, num) {
    let arr = []
    function c() {
        for (let i = 0; i < num; i++) {
            if (!arr[i]) {
                arr[i] = 0
            }
            if (money > 0) {
                arr[i] += 0.01
                money -= 0.01
            }
        }
        if (money <= 0) {
            return
        }
        c()
    }
    c()
    console.log(arr)
    return arr
}

/**
* 红包分配
* @param {Number} money -金额/元
* @param {Number} num -人数
* @return {Array} 金额数组
*/
function redPackage(money = 0.01, num = 1) {
    if (money / num < 0.01) {
        console.log('超过分配限额')
        return
    }
    let moneyArr = cAve(money, num)
    let mdArr = []
    // 平均数
    const ave = money / num
    for (let i = 0; i < num; i++) {
        let ave = moneyArr[i]
        if (ave === 0.01) {
            moneyArr[i] = ave
            mdArr.push(0)
            return
        }
        let md = Number((new Big(Number(Math.random().toFixed(2)))).times(ave).toString())
        if (md < 0.01) {
            md = 0.01
        }
        console.log(md)
        mdArr.push(md)
        let x = new Big(ave)
        moneyArr[i] = Number(x.minus(md).toString())
    }
    // 打乱顺序
    mdArr.reverse()
    // 相加
    moneyArr = moneyArr.map((item, index) => {
        item + mdArr[index]
        let x = new Big(item)
        return Number(x.plus(mdArr[index]).toString())
    })
    // 保证最大值唯一
    console.log(moneyArr)
    console.log(moneyArr.reduce((a, b) => {
        return Number((new Big(a)).plus(b).toString())
    }))
    return []
}
redPackage(1, 90)
redPackage(10, 5)
redPackage(1, 10)