//數(shù)據類型的轉換
                //即string"18"==> int 18,
                //1、parse轉換：將string類型轉化為其他類型
                //待轉數(shù)據必須要像該數(shù)據類型
                string strNumber = "18";
                int num01 = int.Parse(strNumber);
                float num02 = float.Parse(strNumber);

//2、任意類型轉化為string類型
                int number = 18;
                string str = number.ToString();

//3、隱式轉換:自動轉換-->小范圍到大范圍自動轉換
 
            byte b3 = 100;
            int i3 = b3;

 //4、顯示轉換：強制轉換-->由大范圍到小范圍的強制轉換，可能會發(fā)生精度丟失
            int i4 = 100;
            byte b4 = (byte)i4;

            byte numbe1 = 1;
            short numbe2 = 2;
            short resu =numbe1 + numbe2;

            byte numbe1 = 1;
            short numbe2 = 2;
            short resu = (short)(numbe1 + numbe2);
            //或int resu =numbe1 + numbe2;

            byte numbe1 = 1;
            byte numbe2 = 2;
            byte resu = (byte)(numbe1 + numbe2);
            //或int resu =numbe1 + numbe2;

            float numbe1 = 1;
            double numbe2 = 2;
            byte resu = (byte)(numbe1 + numbe2);
            //或double resu = numbe1 + numbe2;

           int a = 1;
            a = a + 3;
            a += 3;
 
 
            byte b = 1;
            b += 3;
            b = b + 3;