学步园

#include <iostream.h>    
  
#include <vector>    
  
using namespace std;   
  
   
  
struct Node   
  
{   
  
int id;   
  
vector<int> score;   
  
};   
  
   
  
void DisplayVector(vector<int> &v)   
  
{   
  
cout<<"sizeof(v) = "<<sizeof(v)<<endl;   
  
for(vector<int>::iterator it = v.begin(); it != v.end(); it++)   
  
{   
  
cout<<*it<<'\t';   
  
}   
  
cout<<endl;   
  
}   
  
   
  
void DisplaySize()   
  
{   
  
cout<<"sizeof(vector<char>) = "<<sizeof(vector<char>)<<endl;   
  
cout<<"sizeof(vector<int>) = "<<sizeof(vector<int>)<<endl;   
  
cout<<"sizeof(vector<short>) = "<<sizeof(vector<short>)<<endl;   
  
cout<<"sizeof(vector<double>) = "<<sizeof(vector<double>)<<endl;   
  
cout<<"sizeof(vector<long>) = "<<sizeof(vector<long>)<<endl;   
  
cout<<"sizeof(vector<float>) = "<<sizeof(vector<float>)<<endl;   
  
}   
  
   
  
int main()   
  
{   
  
DisplaySize();   
  
   
  
Node node;   
  
cout<<"sizeof(Node) = "<<sizeof(node)<<endl;   
  
   
  
node.id = 1;   
  
node.score.push_back(10);   
  
node.score.push_back(20);   
  
node.score.push_back(25);   
  
cout<<"sizeof(Node) = "<<sizeof(node)<<endl;   
  
   
  
DisplayVector(node.score);   
  
   
  
return 0;   
  
}   

 
输出结果：
sizeof(vector<char>) = 16
sizeof(vector<int>) = 16
sizeof(vector<short>) = 16
sizeof(vector<double>) = 16
sizeof(vector<long>) = 16
sizeof(vector<float>) = 16
sizeof(Node) = 20
sizeof(Node) = 20
sizeof(v) = 16
10 20 25
 
 
不管插入多少数据，sizeof(vector<>)大小不变，在vc下始终为16，在vs下据说20