//插入元素 //四种插入方法比较
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     void display()
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     {
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     map<
     
     int,
     
     string> m;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	pair<
     
     map<
     
     int,
     
     string>::iterator,
     
     bool> pair1 ,pair2,pair3;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     //1.方法 
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	pair1 = m.insert(pair<
     
     int,
     
     string>(
     
     1,
     
     "teacher01"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	pair2 = m.insert(pair<
     
     int,
     
     string>(
     
     2,
     
     "teacher02"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	pair3 = m.insert(pair<
     
     int,
     
     string>(
     
     2,
     
     "teacher02"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     if (pair2.second)
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<
     
     "2 teacher02插入成功"<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<pair2.first->first<<
     
     ":"<<pair2.second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     else
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<
     
     "2 teacher02插入失败"<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<pair2.first->first<<
     
     ":"<<pair2.second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     if (pair3.second)
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<
     
     "2 teacher02插入成功"<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<pair3.first->first<<
     
     ":"<<pair3.second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     else
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<
     
     "2 teacher02插入失败"<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<pair3.first->first<<
     
     ":"<<pair3.second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     //2.方法 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m.insert(make_pair(
     
     3,
     
     "teacher03"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m.insert(make_pair(
     
     4,
     
     "teacher04"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     //3.方法 
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m.insert(
     
     map<
     
     int,
     
     string>::value_type(
     
     5,
     
     "teacher05"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m.insert(
     
     map<
     
     int,
     
     string>::value_type(
     
     6,
     
     "teacher06"));
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     //4. 如果key相等 会修改对应的value 
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m[
     
     7] = 
     
     "teacher07";
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m[
     
     8] = 
     
     "teacher08";
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m[
     
     0] = 
     
     "teacher09";
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	m[
     
     0] = 
     
     "teacher00";
    
    
   
   

   
   

    
    

   
   
   
   

    
    
 
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     //遍历
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     for (
     
     map<
     
     int,
     
     string>::iterator it = m.begin();it!=m.end();it++)
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<(*it).first<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<(*it).second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    
	
     
     while (!m.empty())
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	{
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     map<
     
     int,
     
     string>::iterator it = m.begin();
    
    
   
   

   
   

    
    

   
   
   
   

    
    
		
     
     cout<<it->first<<
     
     "\t"<<it->second<<
     
     endl;
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     		m.erase(it);
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     	}
    
    
   
   

   
   

    
    

   
   
   
   

    
    

     
     }
    
    
   
   
 
 

                  </div>
</article>