initial vector with size code example
Example 1: c++ initialize vector of vector with size
vector<vector<int>> v(10, vector<int>(10));
Example 2: c++ initialize size of 3d vector
vector<vector<vector<double>>> f(3, vector<vector<double>>(4, vector<double>(5)));
Example 3: c++ create vector of size
// create a vector with 20 integer elements
std::vector<int> arr(20);
for(int x = 0; x < 20; ++x)
arr[x] = x;