a b
00001 3
00002 2
00003 1 4
00004 2 4 5
00005 1 2
00006 1 2 4
00007 2 5
00008 3 4 5
00009 3 4 5
00010 2 3
This is my data, I open it in C++ with getline and I wish to split them into a 2D vector. wish to have a 10*2 array which first column is a and second column is b. What should I do?
This is my code
int row = 0;
int column = 2;
string line;
vector<vector<string>>info;
ifstream data("C:\\01_test.txt");
while (getline(data, line))
{
row++;
}
data.close();
You can do sth like that:
string line;
int main(){
vector<vector<string> > info;
ifstream data("C:\\01_test.txt");
static int cnt=0;
while(getline(data, line)){
istringstream iss(line);
info.push_back(vector<string>());
copy(istream_iterator<string>(iss), istream_iterator<string>(), back_inserter(info[cnt]));
cnt++;
}
};
if you wanna use vector of int use some function to change string to int like atoi.
The easiest way is to use the istringstream. If you look at the example in the link, it should be quite obvious.
