从文件中读取多维向量

Question

我需要将txt文件中的值读入n x 20向量。该文件就是这样

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 

我想出的代码如下

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，当我打印整个向量像这样，

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; 
     } 
} 

矩阵显示所有但它们都是第一个的重复。出于某种原因，只有第一行被读取。

任何帮助，将不胜感激。

Answer 1

重新使用之前，您必须先清除aRow。否则，你会继续向你的矩阵中输入相同的值。

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