c#构造函数

 public class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("请输入语文成绩和数学成绩");
            string x = Console.ReadLine();
            int c = x.IndexOf(",");
            if (c > 0)
            {
                int a = Convert.ToInt32(x.Substring(0, c));
                int b = Convert.ToInt32(x.Substring(c + 1));




                grades e = new grades(a, b);
                Console.WriteLine(e.ce());
            }
            else {
                Console.WriteLine("错误");
            }
            Console.ReadKey();
        }
    }
}

调用类

public class grades
    {
        public int a;
        public int b;
        //public bool yun(int a, int b) {
        //    if (a > 90 || b > 90)
        //    {
        //        return true;
        //    }
        //    else {

        //        return false;
        //    }
        
        //}
        public grades(int a,int b) {
            this.a = a;
            this.b = b;
            
        }
        
        public bool ce() { 
        if (this.a > 90 || this.b > 90)
        {
            return true;
        }
        else
        {

            return false;
        }
          
        }