从文件中读取多维向量

Question

我需要将 txt 文件中的值读取到 n x 20 向量中。文件是这样的

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，当我像这样打印整个矢量时，

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;
      }
}

矩阵显示了所有行，但它们都与第一行重复。由于某种原因，只读取了第一行。

如有任何帮助，我们将不胜感激。

Answer 1

您必须清除 aRow 才能重新使用它。否则，您会一直将相同的值推入矩阵。

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

从文件中读取多维向量

Reading multidimensional vectors from a file

c++

file

vector

dimensions