我如何修复此处的非法表达式开头

Question

如何修复此处的非法表达式开头，不过我没有发现任何问题

static void divide(double a, double b){
            double c = (number_a / number_b);
            String s;
            if (c == Double.POSITIVE_INFINITY || c == Double.NEGATIVE_INFINITY || c == Double.NaN)
                s = "Undefined";
            else
                s = Double.toString(c);
            System.out.println(s);
        }

Answer 1

试试这个。

static void divide(double a, double b) {
    double c = a / b;
    String s;
    if (Double.isInfinite(c) || Double.isNaN(c))
        s = "Undefined";
    else
        s = Double.toString(c);
    System.out.println(s);
}