C# 变量交换

C# 变量交换

变量交换的方法：

1.借助第三个变量：

 1     class PRogram 2     { 3         static void Main(string[] args) 4         { 5             Exchage(10,5); 6         } 7         /// <summary> 8         /// 交换变量,借助第三个变量 9         /// </summary>10         /// <param name="num1"></param>11         /// <param name="num2"></param>12         private static void Exchage(int num1, int num2)13         {14             //交换前15             Console.WriteLine("num1的值：{0}；num2的值：{1}", num1, num2);16             int temp = num1;17             num1 = num2;18             num2 = temp;19             //交换后20             Console.WriteLine("num1的值：{0}；num2的值：{1}", num1, num2);21             Console.ReadKey();22 23         }24      }

2.累加法：

 1  class Program 2     { 3         static void Main(string[] args) 4         { 5             Exchage(10,5); 6         } 7             /// <summary> 8         /// 交换变量，使用累加法 9         /// </summary>10         /// <param name="num1"></param>11         /// <param name="num2"></param>12         private static void Exchage(int num1,int num2)13         {14             //交换前15              Console.WriteLine("num1的值：{0}；num2的值：{1}", num1, num2);16             num1 = num1 + num2;17             num2 = num1 - num2;18             num1 = num1 - num2;19             Console.WriteLine("num1的值：{0}；num2的值：{1}", num1, num2);20             Console.ReadKey();21 22         }23     }