学步园

输入：max_matrix.txt，4*4的矩阵数据

vector<int> ivec;<br /> vector<int>::iterator iter;<br /> vector<vector<int> > ivecvec;<br /> vector<vector<int> >::iterator iiter;<br /> ifstream infile("max_matrix.txt");<br /> string temp;</p> <p> int a;<br /> while(getline(infile, temp))<br /> {<br /> stringstream line(temp);<br /> while(line >> a)<br /> {<br /> ivec.push_back(a);<br /> }<br /> ivecvec.push_back(ivec);<br /> ivec.clear();<br /> }

别忘了输出重载

ostream& operator << (ostream& os, const vector<int> vec)<br /> {<br /> copy(vec.begin(), vec.end(), ostream_iterator<int>(os, " "));<br /> return os;<br /> }</p> <p>ostream& operator << (ostream& os, vector<vector<int> > vec)<br /> {<br /> //copy(vec.begin(), vec.end(), ostream_iterator<vector<int> >(os, "/n"));<br /> for (vector<vector<int> >::iterator iter = vec.begin(); iter!=vec.end(); iter++)<br /> {<br /> os << *iter << endl;<br /> }<br /> return os;<br /> }

用copy法不能输出二维vector，可能是因为copy通过memmove实现，而本文中的二维创建方法导致其内存不连续。如果有哪位知道怎么用copy法输出多维vector请告诉我