STL学习之vector

vector<vector<vector<int> > > vI3Matrix(3,vector<vector<int> >(2,vector<int>(2,100)));
 for(int i = 0 ; i < 3; i++)
    for(int j = 0; j < 2; j++)
        for(int k = 0; k < 2; k++) 
                printf("%d \r\n",vI3Matrix[i][j][k]);

以上代码定义了一个3x2x2的三维整形数组，并全部初始化为100。很难读，不过作以下分解就很了然了。

vector<int> vI1Matrix(2,100);

vector<vector<int> > vI2Matrix(2,vI1Matrix);

vector<vector<vector<int> > > vI3Matrix(3,vI2Matrix);

通过iterator访问二维vector,三维类推：

#include <iostream>
#include <vector>

 using namespace std;

main()
{
   vector< vector<int> > vI2Matrix;    // Declare two dimensional array
   vector<int> A, B;
   vector< vector<int> >::iterator iter_ii;
   vector<int>::iterator                 iter_jj;

   A.push_back(10);
   A.push_back(20);
   A.push_back(30);
   B.push_back(100);
   B.push_back(200);
   B.push_back(300);

   vI2Matrix.push_back(A);
   vI2Matrix.push_back(B);

   cout << endl << "Using Iterator:" << endl;

   for(iter_ii=vI2Matrix.begin(); iter_ii!=vI2Matrix.end(); iter_ii++)
   {
      for(iter_jj=(*iter_ii).begin(); iter_jj!=(*iter_ii).end(); iter_jj++)
      {
         cout << *iter_jj << endl;
      }
   }
}

Method/operator	Description
vector<T> v;	Vector declaration of data type "T".
vector<T> v(size_type n);	Declaration of vector containing type "T" and of size "n" (quantity).
vector<T> v(size_type n,const T& t);	Declaration of vector containing type "T", of size "n" (quantity) containing value "t". Declaration: vector(size_type n, const T& t)
vector<T> v(begin_iterator,end_iterator);	Copy of Vector of data type "T" and range begin_iterator to end_iterator. Declaration: template vector(InputIterator, InputIterator)

References:

[1],C++ STL Tutorial. http://www.yolinux.com/TUTORIALS/LinuxTutorialC++STL.html