我最近有个不规则文件：大致如下
1 23 45 6
12 4 5 6 7 8 9
12 5 6 8
3 4 5 6
我想把它存入二维向量里并且打印出来，可是我写的程序编译时也没显示什么错误，就是什么也打印不出来
请各位高手能否指点一下呢
# include <iostream>
# include <fstream>
# include <vector>
# include <string>
# include <cassert>
using namespace std;

typedef vector<int> onevector;
typedef vector<onevector> twovector;

void fill(const string&filename,twovector&thevector);
void  print ( ostream&out,const twovector & avector);

int main()
{
        cout << "please input the name of the file:"<< endl;
        string file;
        cin >> file;
        twovecctor avec;
        fill2(file,avec);
        cout << "how to do?\n";
//      cout << avec[0][2] <<'\t'  << endl;
        print (cout,avec);
}

void fill (const string& filename,twovector & avector)
{
        ifstream instream(filename.data());
        assert (instream.is_open());

        twovector locvector;
        int  avalue;
        char separate;

        for (;;)
        {
                onevector arow;
                for (;;)
                {
                separate = instream.peek();
//              if (separate == '\n') break;
                instream >> avalue;
                if (instream.eof()) return;
                arow.push_back(avalue);
                }
        instream.get (separate);
        locvec.push_back(arow);
        }
        avector = locvec;
        instream.close();
}

void   print (ostream&out,const twovector & avector)
{
        for ( int i =0; i < avector.size(); i++)
        {
                for (int j=0; j < avector[i].size(); j++)
                out << avector[i][j] << "\t";
                out << endl;
        }
}

打印不出来，就从打印语句开始追踪，看是不是读到了真正所需的数据。

比较奇怪你这种数据为什么会用嵌套vector，锯齿状很参差不齐吗？

看不懂。。。