用C#语言编写一个计算器程序，要求在程序中能够捕获到算术运算溢出的异常。[/quote]我用两个int才会有异常，float或double就不会抛出异常？请问怎么办？\
我是这样写的
static void Main(string[] args)
        {
            Console.Write("请输入一个数a=");
            int a = Convert.ToInt32(Console.ReadLine());
            Console.Write("请输入一个数b=");
            int b = Convert.ToInt32(Console.ReadLine());
            //double b = Convert.ToDouble(Console.ReadLine());
            Console.Write("请输入一个运算符：");
            string str = Console.ReadLine();
            try
            {
                switch (str)
                {
                    case "+": Console.WriteLine("a+b={0}", a + b); break;
                    case "-": Console.WriteLine("a+b={0}", a - b); break;
                    case "*": Console.WriteLine("a+b={0}", a * b); break;
                    case "/": Console.WriteLine("a+b={0}", a / b); break;
                    default: Console.WriteLine("谢谢使用！ "); break;
                }
            }
            catch (Exception ex)
            {
                switch (str)
                {
                    case "+": Console.WriteLine("a+b={0}", a + b); break;
                    case "-": Console.WriteLine("a+b={0}", a - b); break;
                    case "*": Console.WriteLine("a+b={0}", a * b); break;
                    case "/": Console.WriteLine("a+b={0}", a / b); break;
                    default: Console.WriteLine("谢谢使用！ "); break;
                }
                Console.WriteLine(ex.Message);
            }
            Console.ReadLine();
        }

[ 本帖最后由 宇智波曌 于 2011-11-19 20:53 编辑 ]

期待结果

112

            try
            {
            checked
            {
                switch (str)
                {
                    case "+": Console.WriteLine("a+b={0}", a + b); break;
                    case "-": Console.WriteLine("a+b={0}", a - b); break;
                    case "*": Console.WriteLine("a+b={0}", a * b); break;
                    case "/": Console.WriteLine("a+b={0}", a / b); break;
                    default: Console.WriteLine("谢谢使用！ "); break;
                }
            }
            }