vector <int> col(0);
vector<vector<int> > row(0);
for(i=0;i<10;i++)
col.push_back(some integer);
row.push_back(col);
col.clear();
Can someone tell me what is wrong here? In the col[]
vector, there is no error, but when I go to the next instruction by debug on line the before last line, just size of row[]
changes to 1 from 0, but I can't see the values that it should take from the col[]
vector?
Edit: I tried to put debug screen's screen-shot but reputation thing happened.
There is definitely no problem with your code:
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector< int > col(0);
vector< vector<int> > row(0);
for(int i=0;i<10;i++)
col.push_back(i);
row.push_back(col);
col.clear();
std::cout << "row size is: " << row.size() << std::endl;
std::cout << "row 1st elem size is: " << row[0].size() << std::endl;
std::cout << "col size is: " << col.size() << std::endl;
return 0;
}
This outputs:
row size is: 1
row 1st elem size is: 10
col size is: 0
Which is perfectly expected. Could be a bug in your debugger (it may not show you the actual vector sizes).