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DataStructureAndAlgorithm/02 C#语言基本语法结构.md
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DataStructureAndAlgorithm/02 C#语言基本语法结构.md
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# 02 C#<23><><EFBFBD>Ի<EFBFBD><D4BB><EFBFBD><EFBFBD><EFBFBD>ṹ
|
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|
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**֪ʶ<D6AA>ṹ<EFBFBD><E1B9B9>**
|
||||
|
||||
|
||||
|
||||
---
|
||||
## 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
<EFBFBD><EFBFBD>һ<EFBFBD>ַ<EFBFBD><EFBFBD>ࣺ
|
||||
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD>`byte`<EFBFBD><EFBFBD>`short`<EFBFBD><EFBFBD>`int`<EFBFBD><EFBFBD>`long`<EFBFBD><EFBFBD>`float`<EFBFBD><EFBFBD>`double`<EFBFBD><EFBFBD>`char`<EFBFBD><EFBFBD>`bool`
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD>`struct`<EFBFBD><EFBFBD>`enum`<EFBFBD><EFBFBD>`class`<EFBFBD><EFBFBD>`interface`
|
||||
|
||||
|
||||
|
||||
|
||||
<EFBFBD>ڶ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ࣺ
|
||||
|
||||
- ֵ<><D6B5><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><DDBF><EFBFBD><EFBFBD><EFBFBD>
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD>struct<63><74><EFBFBD>͡<EFBFBD>enum<75><6D><EFBFBD><EFBFBD>
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ַ<EFBFBD><D6B7>
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>class<73><73><EFBFBD>͡<EFBFBD><CDA1><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
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<EFBFBD><EFBFBD>1<EFBFBD><EFBFBD>
|
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```c
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public struct Book
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{
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public double Price;
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public string Title;
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public string Author;
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}
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|
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class Program
|
||||
{
|
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static void ChangeBook(Book bk)
|
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{
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bk.Price = 1.01;
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bk.Title = "Spss";
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bk.Author = "John";
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}
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|
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static void PrintBook(Book bk)
|
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{
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Console.WriteLine("Book Infor:\n Price={0},Tile={1},Author={2}",
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bk.Price, bk.Title, bk.Author);
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}
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static void Main(string[] args)
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{
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Book bk;// = new Book();
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bk.Price = 10.01;
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bk.Title = "MatLab";
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bk.Author = "Tom";
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PrintBook(bk);
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ChangeBook(bk);
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PrintBook(bk);
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|
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//Book Infor:
|
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//Price=10.01,Tile=MatLab,Author=Tom
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//Book Infor:
|
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//Price=10.01,Tile=MatLab,Author=Tom
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}
|
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}
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```
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı䱾<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>
|
||||
|
||||
<EFBFBD><EFBFBD>2<EFBFBD><EFBFBD>
|
||||
```c
|
||||
public class Book
|
||||
{
|
||||
public double Price;
|
||||
public string Title;
|
||||
public string Author;
|
||||
}
|
||||
|
||||
class Program
|
||||
{
|
||||
static void ChangeBook(Book bk)
|
||||
{
|
||||
bk.Price = 1.01;
|
||||
bk.Title = "Spss";
|
||||
bk.Author = "John";
|
||||
}
|
||||
|
||||
static void PrintBook(Book bk)
|
||||
{
|
||||
Console.WriteLine("Book Infor:\n Price={0}, Tile={1}, Author={2}",
|
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bk.Price, bk.Title, bk.Author);
|
||||
}
|
||||
|
||||
static void Main(string[] args)
|
||||
{
|
||||
Book bk = new Book(); //<2F><><EFBFBD><EFBFBD> Book bk;
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bk.Price = 10.01;
|
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bk.Title = "MatLab";
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bk.Author = "Tom";
|
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PrintBook(bk);
|
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// Book Infor:
|
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// Price = 10.01, Tile = MatLab, Author = Tom
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|
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ChangeBook(bk);
|
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PrintBook(bk);
|
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// Book Infor:
|
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// Price = 1.01, Tile = Spss, Author = John
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}
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD>3<EFBFBD><EFBFBD>
|
||||
```c
|
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class Program
|
||||
{
|
||||
static void ChangeArrayItem(int[] array)
|
||||
{
|
||||
for (int i = array.Length - 1; i >= 0; i--)
|
||||
{
|
||||
array[i] = array.Length - 1 - i;
|
||||
}
|
||||
}
|
||||
static void PrintArrayItem(int[] arry)
|
||||
{
|
||||
for (int i = 0; i < arry.Length; i++)
|
||||
{
|
||||
Console.Write("{0} ", arry[i]);
|
||||
}
|
||||
Console.WriteLine();
|
||||
}
|
||||
|
||||
static void Main(string[] args)
|
||||
{
|
||||
int[] arr = new int[3];
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||||
for (int i = 0; i < arr.Length; i++)
|
||||
{
|
||||
arr[i] = i;
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||||
}
|
||||
PrintArrayItem(arr); // 0 1 2
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||||
ChangeArrayItem(arr);
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PrintArrayItem(arr); // 2 1 0
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}
|
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}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD>2<EFBFBD><EFBFBD><EFBFBD><EFBFBD>3˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ַ<EFBFBD><EFBFBD>Ҫ<EFBFBD>ı䱾<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ҫע<EFBFBD>⡰ֵ<EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
|
||||
---
|
||||
## 2<><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>볣<EFBFBD><EBB3A3>
|
||||
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>壺`<60><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;`
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>壺
|
||||
- `readonly` <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><ECBAAF><EFBFBD>г<EFBFBD>ʼ<EFBFBD><CABC>
|
||||
- `const` <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>ʼ<EFBFBD><CABC>
|
||||
|
||||
<EFBFBD><EFBFBD>4<EFBFBD><EFBFBD>
|
||||
```c
|
||||
public class SimpleClass
|
||||
{
|
||||
public int X;
|
||||
public readonly int Y = 2;
|
||||
public readonly int Z;
|
||||
public const double Pi = 3.1415926;
|
||||
public const string Etc = "...";
|
||||
public SimpleClass()
|
||||
{
|
||||
Z = 3;
|
||||
}
|
||||
public SimpleClass(int p1, int p2, int p3)
|
||||
{
|
||||
X = p1;
|
||||
Y = p2;
|
||||
Z = p3;
|
||||
}
|
||||
}
|
||||
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
SimpleClass sp1 = new SimpleClass();
|
||||
sp1.X = 1;
|
||||
Console.WriteLine("sp1:x={0}, y={1}, z={2}", sp1.X, sp1.Y, sp1.Z);
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||||
// sp1: x = 1, y = 2, z = 3
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||||
|
||||
SimpleClass sp2 = new SimpleClass(-1, -2, -3);
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||||
Console.WriteLine("sp2:x={0} ,y={1}, z={2}", sp2.X, sp2.Y, sp2.Z);
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||||
// sp2: x = -1 ,y = -2, z = -3
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||||
|
||||
Console.WriteLine("PI={0}{1}", SimpleClass.Pi, SimpleClass.Etc);
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||||
// PI = 3.1415926...
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD>`readonly`<EFBFBD><EFBFBD>`const`<EFBFBD><EFBFBD><EFBFBD>峣<EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD>ʹ<EFBFBD>øó<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
---
|
||||
## 3<><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
- һԪ<D2BB><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `x++`,`y++`
|
||||
- <20><>Ԫ<EFBFBD><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `x+y`,`x-y`
|
||||
- <20><>Ԫ<EFBFBD><D4AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `max = (x>y)?x:y;`
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
- <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `+<2B><>-<2D><>*<2A><>/<2F><>%`
|
||||
- <20><>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `><3E><>>=<3D><>==<3D><>!=<3D><><=<3D><><`
|
||||
- <20><EFBFBD><DFBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> `!<21><>&&<26><>||`
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD>ʽ<EFBFBD>ӡ<EFBFBD>
|
||||
|
||||
|
||||
|
||||
---
|
||||
## 4<><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
**4.1 <20><>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>**
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> = <20><><EFBFBD><EFBFBD>ʽ;
|
||||
|
||||
**4.2 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
|
||||
|
||||
<EFBFBD><EFBFBD>һ<EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
if(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD>ڶ<EFBFBD><EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
if(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
else
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
if(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ1)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
|
||||
}
|
||||
else if(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ2)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
|
||||
}
|
||||
else if(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽN)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>N;
|
||||
}
|
||||
else
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>N+1;
|
||||
}
|
||||
```
|
||||
|
||||
**4.3 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
|
||||
|
||||
```c
|
||||
swith(<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ)
|
||||
{
|
||||
case ֵ1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1; break;
|
||||
case ֵ2<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2; break;
|
||||
case ֵN<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>N; break;
|
||||
default<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>N+1; break;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD>5<EFBFBD><EFBFBD>
|
||||
```c
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
Random rdm = new Random();
|
||||
int i = rdm.Next(1, 5);
|
||||
Console.WriteLine(i); // 1
|
||||
switch (i)
|
||||
{
|
||||
case 1:
|
||||
Console.WriteLine("Case 1.");
|
||||
break;
|
||||
case 2:
|
||||
Console.WriteLine("Case 2.");
|
||||
break;
|
||||
case 3:
|
||||
Console.WriteLine("Case 3.");
|
||||
break;
|
||||
default:
|
||||
Console.WriteLine("Default Case.");
|
||||
break;
|
||||
}
|
||||
// Case 1.
|
||||
|
||||
i = rdm.Next(1, 5);// 1
|
||||
Console.WriteLine(i);
|
||||
switch (i)
|
||||
{
|
||||
case 1:
|
||||
case 2:
|
||||
case 3:
|
||||
Console.WriteLine("It's 1,2 or 3.");
|
||||
break;
|
||||
default:
|
||||
Console.WriteLine("Not Sure What it is.");
|
||||
break;
|
||||
}
|
||||
//It's 1,2 or 3.
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD>`switch`<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>`case`<EFBFBD><EFBFBD><EFBFBD>䶼<EFBFBD><EFBFBD>Ҫƥ<EFBFBD><EFBFBD>`break`<EFBFBD><EFBFBD><EFBFBD>䡣
|
||||
|
||||
**4.4 ѭ<><D1AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
|
||||
|
||||
<EFBFBD><EFBFBD>һ<EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
for(<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ;<EFBFBD>ж<EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݼ<EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD>ڶ<EFBFBD><EFBFBD>֣<EFBFBD>
|
||||
|
||||
```c
|
||||
while(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
do
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
}while(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ);
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD>
|
||||
```c
|
||||
foreach(Ԫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Ԫ<EFBFBD><EFBFBD> in <EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;//ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><DAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>ÿ<EFBFBD><C3BF>Ԫ<EFBFBD><D4AA>
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD>6<EFBFBD><EFBFBD>
|
||||
|
||||
```c
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
int i;
|
||||
int sum = 0;
|
||||
for (i = 1; i <= 10; i++)
|
||||
{
|
||||
sum += i;
|
||||
}
|
||||
Console.WriteLine(sum);// 55
|
||||
|
||||
sum = 0;
|
||||
i = 1;
|
||||
while (i <= 10)
|
||||
{
|
||||
sum += i;
|
||||
i++;
|
||||
}
|
||||
Console.WriteLine(sum);// 55
|
||||
|
||||
sum = 0;
|
||||
i = 1;
|
||||
do
|
||||
{
|
||||
sum += i;
|
||||
i++;
|
||||
} while (i <= 10);
|
||||
Console.WriteLine(sum);// 55
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
|
||||
|
||||
<EFBFBD><EFBFBD>7<EFBFBD><EFBFBD>
|
||||
|
||||
```c
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
int[] arry = new int[] { 1, 3, 5, 7 };
|
||||
foreach (int i in arry)
|
||||
{
|
||||
Console.WriteLine(i);
|
||||
}
|
||||
// 1
|
||||
// 3
|
||||
// 5
|
||||
// 7
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
**4.5 try<72><79>catch<63><68>finally <20><><EFBFBD><EFBFBD>**
|
||||
|
||||
```c
|
||||
try
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
catch(Exception ex)
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
finally
|
||||
{
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD>8<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD>*<2A><><EFBFBD>š<EFBFBD>
|
||||
|
||||
```c
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
Console.WriteLine("<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:");
|
||||
// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
|
||||
// abc
|
||||
|
||||
string sTemp = Console.ReadLine();
|
||||
try
|
||||
{
|
||||
int iCount = int.Parse(sTemp);
|
||||
for (int i = 0; i < iCount; i++)
|
||||
{
|
||||
Console.Write("*");
|
||||
}
|
||||
Console.WriteLine();
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Console.WriteLine("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>Ϊ:" + ex.Message);
|
||||
// <20><><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>Ϊ:<3A><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>ĸ<EFBFBD>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>ȷ<EFBFBD><C8B7>
|
||||
}
|
||||
finally
|
||||
{
|
||||
Console.WriteLine("<EFBFBD><EFBFBD><EFBFBD><EFBFBD>.");
|
||||
// <20><><EFBFBD><EFBFBD>.
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD>`try<72><79>catch<63><68>finally`<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣<EFBFBD><EFBFBD>
|
||||
|
||||
|
||||
**4.6 break<61><6B>continue <20><><EFBFBD><EFBFBD>**
|
||||
|
||||
- `break`<EFBFBD><EFBFBD><EFBFBD>䣺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>`switch`<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
- `continue`<EFBFBD><EFBFBD><EFBFBD>䣺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD>
|
||||
|
||||
<EFBFBD><EFBFBD>9<EFBFBD><EFBFBD>
|
||||
```c
|
||||
class Program
|
||||
{
|
||||
static void Main(string[] args)
|
||||
{
|
||||
for (int i = 1; i <= 100; i++)
|
||||
{
|
||||
if (i == 5)
|
||||
break;
|
||||
Console.WriteLine(i);
|
||||
}
|
||||
// 1
|
||||
// 2
|
||||
// 3
|
||||
// 4
|
||||
|
||||
for (int i = 1; i <= 100; i++)
|
||||
{
|
||||
if (i < 99)
|
||||
continue;
|
||||
Console.WriteLine(i);
|
||||
}
|
||||
// 99
|
||||
// 100
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
**4.7 ע<><D7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
|
||||
|
||||
- <20><><EFBFBD><EFBFBD>ע<EFBFBD>ͣ<EFBFBD>`//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>`
|
||||
- <20><><EFBFBD><EFBFBD>ע<EFBFBD>ͣ<EFBFBD>`/*<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>*/`
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user