從文件中讀取多維向量

Question

我需要將txt文件中的值讀入n x 20向量。該文件就是這樣

pipe 1 2 0 1 1 50 120 5 5 6 0 0 
pipe 2 3 0 1 1 50 120 4 5 2 0 0 
pipe 3 4 0 1 1 25 120 1 5 4 80 90 

我想出的代碼如下

vector<double> aRow; 
vector< vector <double>> aPipes; 

ifstream inf("F:\\text.txt"); 
while (inf >> c0 >> c1 >> c2 >> c3 >> c4 >> c5 >> c6 >> c7 >> c8 >> c9 >> c10 >> c11 >> c12) 
    { 
     if (c0 == "pipe") 
     { 
       aRow.push_back(c1);   
       aRow.push_back(c2);   
       aRow.push_back(0);   
       aRow.push_back(c4);   
       aRow.push_back(c5);   
       aRow.push_back(c6);   
       aRow.push_back(c7);   
       aRow.push_back(c8);   
       aRow.push_back(c9);   
       aRow.push_back(c10);   
       aRow.push_back(c11);   
       aRow.push_back(c12);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aRow.push_back(0);   
       aPipes.push_back(aRow); 
      i++; 
     } 
    } 

nNumPipes = i; 
cout << "Num of pipes: " << nNumPipes << endl; 

然而，當我打印整個向量像這樣，

for (int i = 0; i < nNumPipes; i++) 
{ 
     {for (int j = 0; j < 20; j++) 
      cout << setprecision(3) << aPipes.at(i).at(j) << "\t"; 
      cout << endl; 
     } 
} 

矩陣顯示所有但它們都是第一個的重複。出於某種原因，只有第一行被讀取。

任何幫助，將不勝感激。

Answer 1

重新使用之前，您必須先清除aRow。否則，你會繼續向你的矩陣中輸入相同的值。

aPipes.push_back(aRow);後添加aRow.clear();