How do I use multidimensional vectors in C++?

How do I use multidimensional vectors in C++?

You can use the std::vector class to create multidimensional vectors in C++. For example, a 2D vector can be declared as std::vector<std::vector<int>> matrix;.

Can you show me how to initialize a 2D vector?

Sure! You can initialize a 2D vector like this: std::vector<std::vector<int>> matrix(3, std::vector<int>(4)); This creates a 3x4 matrix.

How do I access elements in this 2D vector?

You can access elements using the syntax matrix[row][column]. For example, matrix[1][2] accesses the element in the second row and third column.

What if I want to resize the vector later?

You can use the resize method. For example, matrix.resize(4, std::vector<int>(5)); will resize it to 4 rows and 5 columns.