How can I push_back data in a 2d vector of type int

Question

I have a vector and want to store int data in to it at run time can I store the data in a 2D vector in this manner ?

std::vector> n         


        

Answer 1

You have a vector of vectors.

normal[i] Does not exist because you have not created it.

std::vector > normal:
for(i=0;i<10;i++){
    normal.emplace_back();
    for(j=0;j<20;j++){
        normal.back().push_back(j);
    }
}

for(i=0;i<10;i++){
    for(j=0;j<20;j++){
        std::cout << normal[i][j] << " ";
    }
    std::cout << std::endl;
}