I wanna load a multidimentional array from a file, I have this code:
std::vector<std::vector<int>> matrix;
for (int r = 0; r < cols; r++)
{
std::vector<int> row;
for ( int c = 0 ; c < cols ; c++ )
{
int temp;
if ( fin >> temp )
{
std::cout << temp;
row.push_back(temp);
}
}
matrix.push_back(row);
}
Cols variable is fine, the nested loop is called 9 times if I have 3x3 array, so this works as expected...However it seems that the file cannot read single integer (fin >> temp
). Fin is the file handler. What's wrong?
File content:
0 1 1
0 0 1
1 1 1
The whole code:
std::vector<std::vector<int>> foo()
{
std::string filename;
std::cout << "Filename: ";
std::cin >> filename;
std::vector<std::vector<int> > matrix;
std::ifstream fin(filename);
if(!fin) {
std::cout << "Error";
exit(EXIT_FAILURE);
}
std::string line;
int cols = 0;
if(fin.is_open()){
while(!fin.eof()){
std::getline(fin,line);
cols++;
}
}
for (int r = 0; r < cols; r++)
{
std::vector<int> row;
for ( int c = 0 ; c < cols ; c++ )
{
int temp;
if ( fin >> temp )
{
std::cout << temp; // displays nothing
row.push_back(temp);
}
std::cout << temp; // displays some crap like -84343141
}
matrix.push_back(row);
}
std::cin >> filename; // to stop execution and see the results
return matrix;
}