diff --git a/C#进阶/C#进阶.sln b/C#进阶/C#进阶.sln index 87dd804..4530a4d 100644 --- a/C#进阶/C#进阶.sln +++ b/C#进阶/C#进阶.sln @@ -9,6 +9,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson1_ArrayList", "Lesson EndProject Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson1_ArrayList练习题", "Lesson1_ArrayList练习题\Lesson1_ArrayList练习题.csproj", "{B9F9E174-21EA-40E7-A139-58FFD3448023}" EndProject +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson2_Stack", "Lesson2_Stack\Lesson2_Stack.csproj", "{8353E167-0804-4902-A15A-3FA209EB6C6E}" +EndProject +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson2_Stack练习题", "Lesson2_Stack练习题\Lesson2_Stack练习题.csproj", "{BE917425-E4A8-4C51-89BE-8F6DD86A1C00}" +EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU @@ -27,6 +31,14 @@ Global {B9F9E174-21EA-40E7-A139-58FFD3448023}.Debug|Any CPU.Build.0 = Debug|Any CPU {B9F9E174-21EA-40E7-A139-58FFD3448023}.Release|Any CPU.ActiveCfg = Release|Any CPU {B9F9E174-21EA-40E7-A139-58FFD3448023}.Release|Any CPU.Build.0 = Release|Any CPU + {8353E167-0804-4902-A15A-3FA209EB6C6E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {8353E167-0804-4902-A15A-3FA209EB6C6E}.Debug|Any CPU.Build.0 = Debug|Any CPU + {8353E167-0804-4902-A15A-3FA209EB6C6E}.Release|Any CPU.ActiveCfg = Release|Any CPU + {8353E167-0804-4902-A15A-3FA209EB6C6E}.Release|Any CPU.Build.0 = Release|Any CPU + {BE917425-E4A8-4C51-89BE-8F6DD86A1C00}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {BE917425-E4A8-4C51-89BE-8F6DD86A1C00}.Debug|Any CPU.Build.0 = Debug|Any CPU + {BE917425-E4A8-4C51-89BE-8F6DD86A1C00}.Release|Any CPU.ActiveCfg = Release|Any CPU + {BE917425-E4A8-4C51-89BE-8F6DD86A1C00}.Release|Any CPU.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE diff --git a/C#进阶/Lesson2_Stack/Lesson2_Stack.csproj b/C#进阶/Lesson2_Stack/Lesson2_Stack.csproj new file mode 100644 index 0000000..2150e37 --- /dev/null +++ b/C#进阶/Lesson2_Stack/Lesson2_Stack.csproj @@ -0,0 +1,10 @@ + + + + Exe + net8.0 + enable + enable + + + diff --git a/C#进阶/Lesson2_Stack/Program.cs b/C#进阶/Lesson2_Stack/Program.cs new file mode 100644 index 0000000..400ea17 --- /dev/null +++ b/C#进阶/Lesson2_Stack/Program.cs @@ -0,0 +1,109 @@ +using System.Collections; +namespace Lesson2_Stack +{ + class Test() + { + + } + class Program + { + static void Main(string[] args) + { + #region 知识点一 Stack本质 + //stack是C#是为我们封装好的类 + //本质是一个Object数组，只是封装了特殊的存储规则 + + //stack是栈存储容器，栈是一种先进后出的数据结构 + //先存入的数据后取出，后存入的数据先取出 + //栈的存储规则：后进先出 + #endregion + + #region 知识点二 声明 + //需要引用命名空间system.collections + Stack stack = new Stack(); + #endregion + + #region 知识点三 增取查改 + + #region 增 + //压栈 + stack.Push(1); + stack.Push("123"); + stack.Push(true); + stack.Push(3.14f); + stack.Push(new Test()); + #endregion + + #region 取 + //栈中不存在删除的概念 + //只能取出栈顶的数据 + //弹栈 + object v = stack.Pop();//弹出栈顶元素，下次弹出的是下一个元素 + Console.WriteLine(v); + v = stack.Pop(); + Console.WriteLine(v); + #endregion + + #region 查 + //栈无法查看指定位置的元素,栈没有提供索引器 + //只能查看栈顶的元素 + v = stack.Peek();//只看不弹出 + Console.WriteLine(v); + v = stack.Peek(); + Console.WriteLine(v); + + //查看元素是否存在于栈中 + if (stack.Contains(3.14f)) + { + Console.WriteLine("存在3.14"); + } + if (stack.Contains("123")) + { + Console.WriteLine("存在123"); + } + #endregion + + #region 改 + //栈无法修改指定位置的元素 + //只能修改栈顶的元素或清空 + stack.Clear();//清空栈 + stack.Push("1"); + stack.Push(2); + stack.Push("gfjd"); + #endregion + #endregion + + #region 知识点四 遍历 + //1.长度 + Console.WriteLine(stack.Count); + + //2.遍历 + foreach(Object o in stack) + { + Console.WriteLine(o); + } + + //3.还有一种遍历方式 + //先将栈转换为数组 + //注意转换后的数组是倒序的 + object[] arr = stack.ToArray(); + for(int i = 0;i < arr.Length; i++) + { + Console.WriteLine(arr[i]); + } + + //4.循环弹栈 + while(stack.Count > 0) + { + Console.WriteLine(stack.Pop()); + } + #endregion + + #region 知识点五 + //由于用object来存储数据，所以存储值类型时会装箱，取出时需要拆箱 + //Push值类型时装箱 + //弹出时拆箱 + #endregion + } + } +} diff --git a/C#进阶/Lesson2_Stack练习题/Lesson2_Stack练习题.csproj b/C#进阶/Lesson2_Stack练习题/Lesson2_Stack练习题.csproj new file mode 100644 index 0000000..2150e37 --- /dev/null +++ b/C#进阶/Lesson2_Stack练习题/Lesson2_Stack练习题.csproj @@ -0,0 +1,10 @@ + + + + Exe + net8.0 + enable + enable + + + diff --git a/C#进阶/Lesson2_Stack练习题/Program.cs b/C#进阶/Lesson2_Stack练习题/Program.cs new file mode 100644 index 0000000..69c1a76 --- /dev/null +++ b/C#进阶/Lesson2_Stack练习题/Program.cs @@ -0,0 +1,24 @@ +using System.Collections; +namespace Lesson2_Stack练习题 +{ + internal class Program + { + static void Main(string[] args) + { + Console.Write("输入一个数字:"); + int num = int.Parse(Console.ReadLine()); + Stack bio = new Stack(); + while (num != 0) + { + int r = num % 2; + bio.Push(r); + num /= 2; + } + Console.Write("你输入的数字二进制为:"); + while (bio.Count > 0) + { + Console.Write(bio.Pop()); + } + } + } +}