//程序控制结构与函数
// switch/case struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

enum member_type
{
 manager, //经理
 normal,  //普通员工
};

int get_money(member_type type)
{
 int ir=0;
 switch(type)
 {
 case manager: //case后必须是整数型常量类型
  ir=1000;
  cout<<ir<<endl;
  break;
 case normal:
  ir=500;
  cout<<ir<<endl;
  break;
 default:
  ir=100;
  cout<<ir<<endl;
 }
 return ir;
}

void main()
{
 get_money(normal);
}
=======
// if-else if-else struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

enum member_type
{
 manager, //经理
 normal,  //普通员工
};

int get_money(member_type type)
{
 int ir=0;
 if (type==manager)
 {
  cout<<1000<<endl;
 }
 else if (type==normal)
 {
  cout<<500<<endl;
 }
 else
 {
  cout<<100<<endl;
 }
 return ir;
}

void main()
{
 get_money(normal);
}
==========
// for struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get()
{
 int ir=0;
 for(int i=1;i<=100;i++)
 {
  ir+=i;
     //cout<<ir<<endl;
 }
 return ir;

}
void main()
{
 int va_value=get();
 cout<<va_value<<endl;
}
===========
// for struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get()
{
 int ir=0;
 for(int i=1;i<=100;)
 {
  ir+=i;
  i++; //可以把步进移到这里
     //cout<<ir<<endl;
 }
 return ir;

}
void main()
{
 int va_value=get();
 cout<<va_value<<endl;

}
===========
// for struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

void get()
{
 for(int i=1;i<=100;i++)
 {
 }
 cout<<i<<endl; //i的生命周期在for循环外部

}
void main()
{
 get();
}
=========
// while struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get()
{
 int ir=0;
 int i=1;
 while(i<=100)
 {
  ir+=i;
  i++;
  //cout<<ir<<endl;
 }
 return ir;
 
}
void main()
{
 int va_value=get();
 cout<<va_value<<endl;
}
=========
// do while struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get()
{
 int ir=0;
 int i=1;
 do
 {
  ir+=i;
  i++;
  //cout<<ir<<endl;
 }while(i<=100);
 return ir;
 
}
void main()
{
 int va_value=get();
 cout<<va_value<<endl;
}
=======
// while & break struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get()
{
 int ir=0;
 int i=1;
 while(true)
 {
  ir+=i;
  i++;
  if(i>100)
   break;
  //cout<<ir<<endl;
 }
 return ir;
 
}
void main()
{
 int va_value=get();
 cout<<va_value<<endl;
}
===========
// while continue struct
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

int get_count(const char* str)
{
 int ir=0;
 if(str)
 {
  while (*str)
  {
   char ch=*str;
   cout<<ch<<endl;
   str++; //先跳到下一个字母再continue否则就读b死循环了.
   if(ch!='A')
    continue;
   ir++;
  }
 }
 return ir;
}
void main()
{
 cout<<get_count("AbcACAC")<<endl;
}
=============
// 参数传递
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

void print(int i)
{
 cout<<i<<endl;
 i++; //i只在函数体中生存
}

int main()
{
 int k=100;
 print(k);
 cout<<k<<endl;
 return 0;
}
===========
// 参数传递
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

void print(int& i) //传的是地址
{
 cout<<i<<endl;
 i++;
}

int main()
{
 int k=100;
 print(k);
 cout<<k<<endl;
 return 0;
}
=========
// 参数传递
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

void print(int* i) //传指针
{
 cout<<*i<<endl;
 (*i)++; //指针指向加1而不是指针加1
}

int main()
{
 int k=100;
 print(&k);
 cout<<k<<endl;
 return 0;
}
=============
// 参数传递
//
＃i nclude "stdafx.h"
＃i nclude "iostream"
＃i nclude "string"
using namespace std;

void print(int i=100) //参数可以有默认值
{
 cout<<i<<endl;
}

int main()
{
 int k=200;
 print(200);
 print();
 return 0;
}