下面的类定义有什么问题?请修改错误,使程序运行时不会出问题。 class Avg { public static void main(String[] args) { double a = 5.1; double b = 20.32; double c = 32.921; System.out.println(findAvg(a, b, c)); } double findAvg(double a, double b, double c) { return (a + b + c) / 3.0; } }