how to insert a vector into multi-dimensional vector?

Question

Lets say i have vector of vectors

vector< vector<int> > bigTable;

vector<int> data;
data.resize(2);
fingertable.resize(5,data);

How do i insert a vector in?

    vector<int> newData;
    newData.resize(2);
    newData.push_back(123);
    newData.push_back(456);

When i do the following, the data in the bigTable vector is still 0.

bigTable.push_back(newData);
    cout << bigTable[0][0]; // this will produce an output of 0

Answer 1

I think you misunderstand what resize does (perhaps you're thinking of reserve ?). After your second code snippet, newData will contain 4 elements: 0 , 0 , 123 , 456 .