c++ - 2D vector push_back -


i have code below , i'm strugling add values vector. end goal itterate through list , each itteration add value 2 rows of vector i'm strugling understand how push_back 2d vector.

    std::vector<std::vector<int> >nns; int = 5; nns.push_back(i, i); for(int = 0; <nns.size(); i++) {     for(int j = 0; j < nns[i].size(); j++)     {         std::cout << nns[i][j] << std::endl;     } }

how add 1 column vector? vector[0][0] = 0 vector[1][0] = 0?

answer provided algirdas works perfectly.

#include <iostream> #include <vector> using namespace std;  int main() {   std::vector<std::vector<int> > nns;   int = 5;   nns.push_back(std::vector<int>{i});   (int = 0; < nns.size(); i++) {     (int j = 0; j < nns[i].size(); j++) {       std::cout << nns[i][j] << std::endl;     }   } }

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