//文件名：CHAPTER5-3.cpp
#include <iostream>
#include <vector>
using namespace std;
void print (vector < double >& vector_)
{  for (int i = 0; i < vector_.size (); i++) cout << vector_[i] << " ";
  cout << endl;
}
int main ()
{ vector < double > v1; // 定義了一空的類型為double的vector向量.
  v1.push_back (32.1); //插入值到向量中
  v1.push_back (40.5);
  vector< double > v2; // 定義另外一個(gè)向量
  v2.push_back (3.56);
  cout << "v1 = ";
  print (v1);
  cout << "v2 = ";
  print (v2);
  v1.swap (v2); // 兩個(gè)向量的內(nèi)容進(jìn)行交換
  cout << "v1 = ";
  print (v1);
  cout << "v2 = ";
  print (v2);
  v2 = v1; //把v1中的元素賦值給v2
  cout << "v2 = ";
  print (v2);
  return 0;
}