Convert类型转换

        static void Main(string[] args)
        {
            //Convert转换:不同数据类型之间的转换;
            //大前提: 面儿上一定要过得去

            Console.WriteLine("请输入你的姓名:");
            string strName = Console.ReadLine();
            Console.WriteLine("请输入你的数学成绩:");
            double douMath = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("请输入你的语文成绩:");
            double douChinese = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("请输入你的英语成绩:");
            double douEnglish = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("{0},你的总分是{1}, 你的平均分是{2:0.00};", strName, douMath + douChinese + douEnglish, (douMath + douChinese + douEnglish) / 3);
            
            if (douMath>=60 && douChinese>=60 && douEnglish>=60)
            {
                Console.WriteLine("恭喜你,成绩合格!");
            }
            else
            {
                Console.WriteLine("很抱歉, 你的部分成绩不合格!");
            }
            Console.ReadKey();
        }

        static void Main(string[] args)
        {
            Console.WriteLine("46天是{0}周零{1}天;", 46 / 7, 46 % 7);
            Console.ReadKey();
        }

        static void Main(string[] args)
        {
            const int intAllSecond= 107653;
            int intDay = intAllSecond / (24 * 60 * 60);
            int intHour = (intAllSecond % (24 * 60 * 60)) / (60 * 60);
            int intMinute= ((intAllSecond % (24 * 60 * 60)) % (60 * 60))/60;
            int intSecond= intAllSecond  % 60;
            Console.WriteLine("{0}天,{1}时,{2}分,{3}秒", intDay, intHour, intMinute, intSecond);
            Console.ReadKey();
        }