How do I perform operations on 2D vectors in C++11?
An example of an AI chatbot conversation about C++11 std::vector for 2D operations.
How do I create a 2D vector in C++11?
You can create a 2D vector in C++11 using std::vector<std::vector<int>> vec(rows, std::vector<int>(cols));.
How can I access elements in this 2D vector?
You can access elements using vec[i][j], where i is the row index and j is the column index.
What if I want to resize the 2D vector?
You can resize it using vec.resize(new_rows, std::vector<int>(new_cols)); to set new dimensions.
Can I iterate through all elements in the 2D vector?
Yes, you can use nested loops: for (auto& row : vec) { for (auto& elem : row) { /* process elem */ } }.
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