how to increase size of vector c++ code example
Example 1: when a vector in c++ is resized what happens to the elements of the vector
The C++ function std::vector::resize() changes the size of vector. If n is smaller than current size then extra elements are destroyed.
If n is greater than current container size then new elements are inserted at the end of vector.
If val is specified then new elements are initialed with val.
Example 2: c++ create vector of size
std::vector<int> arr(20);
for(int x = 0; x < 20; ++x)
arr[x] = x;
Example 3: declare vector of size n in c++
#include <vector>
auto n = 20
std::vector<int> arr(n);