c introduction to simple program example code

1 basic input and output

static void main(string[] args)  
{  
 console.writeline(" Enter something ");  
string s=console.readline();  
console.writeline(" welcome "+s);  
console.readline();  
}  

2. Use of structure types

namespace  
{  
  struct student  
   {  
     public string stu_id;  
     public string name;  
     public int age;  
     public int score;  
    }  
  class program   
   {  
     static void maini(string[] args)  
    {  
    student s;  
    s.stu_id='' 09306101'';  
    s.name='' The little red '';  
    s.age=29;  
    s.score=99;  
    console.writeline('' Student id :''+s.stu_id);  
    console.readline();  
  }   
}   
}  

3. Use of array, find the maximum and minimum value of array

static void mian(string[] args)  
{  
  int max,min;  
  int[] a=new int[10]{1,24,3,72,37,45,41,5,44,8};  
max=a[0];  
min=a[0];  
for(int i=1;i<a.length;i++)  
{  
 if(max<a[i])  
max=a[i];  
if(min>a[i])  
min=a[i];  
}  
comsole.writeline ( '' The maximum {0}'',max);  
comsole.writeline('' The minimum value {0}'',miin);  
console.readline();  
  }  
 }  
}  

4. Common methods of string

static void main(string[] args)  
{  
console.writeline(" Please enter user name: ");  
string s=console.readline();  
if(string.compare(s,''wxy'')==0)  
{  
console.writeline(''  Here we go: ");  
string str='' hello'';  
console.writeline(" Copy string: {0},string.copy(str1));  
console.writeline(" String: {}",str.substring(3.2));  
console.writeline(" Insert: {0}'',str1.insert(3,"******"));  
}  
else  
{  
console.writeline(" User name error, exit the program ");  
}  
console.readline();  
}}}  

5. Explicit conversion and implicit conversion

static void main(string[] args)  
{  
  console.writeline(" Implicit conversion :");  
  short i=1234;  
 console.writeline(i);  
  int s=i;  
console.writeline(s);  
console.writeline(" Explicit conversion: ");  
long l=12345;  
console.writeline(l);  
int l1=(int)l;  
console.writeline(l1);  
console.readline();  
}  

6. Packing and unpacking

static void main(string[] args)  
{  
int i=123;  
object obj=123;  
int j=(int)obj;  
console.writeline("x={0}",i);  
console.writeline("obj={0}",obj);  
console.writeline("j={0}",j);  
console.readline();  
}