C#入门基础

using System; using System.Text; using System.Collections; class Test { static void Main() { string s = "yes"; string t = string.Copy(s); Stack stack = new Stack(); stack.Push(4); stack.Push("zrq"); while (stack.Count > 0) { Object obj; obj = stack.Pop(); Console.WriteLine("Type: {0}/tContent: {1}", obj.GetType().ToString(), obj); } } } /* * 输出结果： Type: System.String Content: zrq Type: System.Int32 Content: 4 */ using System; using System.Text; using System.Collections; class Test { static void Swap(ref int a, ref int b)//引用参数用于“传址调用”参数传递 { int temp = a; a = b; b = temp; } static void Main() { int w = 1; int t = 2; Console.WriteLine("w={0}, t={1}", w, t); Swap(ref w,ref t);//引用参数用ref修饰，在具体调用参数的时候，也必须在参数前指定ref关键字 Console.WriteLine("w={0}, t={1}", w, t); } } /* * 输出结果： w=1, t=2 w=2, t=1 */ using System; class Test { static void Divide(int a, int b, out int result, out int remainder) { result = a / b; remainder = a % b; } static void Main() { for (int i = 1; i < 10; i++) for (int j = 1; j < 10; j++) { int ans, r; Divide(i, j, out ans, out r); Console.WriteLine("{0} / {1} = 商{2}余{3}", i, j, ans, r); } } } /* * 对于输出参数来说，调用者提供的自变量的初始值并不重要，除此之外，输出参数与引用参数类似。输出参数是用 out 修饰符声明的。 */