js浮點計算

function accAdd(h, g) {
    var f, d, b, j;
    try {
        f = h.toString().split(".")[1].length
    } catch (i) {
        f = 0
    }
    try {
        d = g.toString().split(".")[1].length
    } catch (i) {
        d = 0
    }
    j = Math.abs(f - d);
    b = Math.pow(10, Math.max(f, d));
    if (j > 0) {
        var a = Math.pow(10, j);
        if (f > d) {
            h = Number(h.toString().replace(".", ""));
            g = Number(g.toString().replace(".", "")) * a
        } else {
            h = Number(h.toString().replace(".", "")) * a;
            g = Number(g.toString().replace(".", ""))
        }
    } else {
        h = Number(h.toString().replace(".", ""));
        g = Number(g.toString().replace(".", ""))
    }
    return (h + g) / b
}
function accSub(f, d) {
    var c, b, a, h;
    try {
        c = f.toString().split(".")[1].length
    } catch (g) {
        c = 0
    }
    try {
        b = d.toString().split(".")[1].length
    } catch (g) {
        b = 0
    }
    a = Math.pow(10, Math.max(c, b));
    h = (c >= b) ? c : b;
    return ((f * a - d * a) / a).toFixed(h)
}
function accMul(d, b) {
    var a = 0
      , f = d.toString()
      , c = b.toString();
    try {
        a += f.split(".")[1].length
    } catch (g) {}
    try {
        a += c.split(".")[1].length
    } catch (g) {}
    return Number(f.replace(".", "")) * Number(c.replace(".", "")) / Math.pow(10, a)
}
function accDiv(arg1, arg2) {
    var t1 = 0, t2 = 0, r1, r2;
    try {
        t1 = arg1.toString().split(".")[1].length
    } catch (e) {}
    try {
        t2 = arg2.toString().split(".")[1].length
    } catch (e) {}
    with (Math) {
        r1 = Number(arg1.toString().replace(".", ""));
        r2 = Number(arg2.toString().replace(".", ""));
        return (r1 / r2) * pow(10, t2 - t1)
    }
}