Answers for "c++ vector resize"

C++
2

initialize 3d vector c++

vector<vector<vector<double>>> f(3, vector<vector<double>>(4, vector<double>(5)));
Posted by: Guest on May-05-2020
1

3d vector c++ resize

dp.resize(n+1,vector<vector<int>>(n+1,vector<int>(n+1,-1)));
Posted by: Guest on July-27-2021
5

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.
Posted by: Guest on April-28-2020
0

c++ vector extend vector

std::vector<int> a = {1, 2};
std::vector<int> b = {3, 4, 5};
a.insert(a.end(), b.begin(), b.end()); // a = {1, 2, 3, 4, 5}
Posted by: Guest on January-22-2021
2

c++ vector resize

std::vector<int> vec = {1, 2, 3};
vec.resize(2); // {1, 2}
vec.resize(4); // {1, 2, 0, 0,}
vec.resize(6, 9);  // {1, 2, 0, 0, 9, 9}
Posted by: Guest on January-22-2021
0

Resize vector c++

resize (size_type n, const value_type& val);

The resize() method (and passing argument to constructor is equivalent to that)
  
will insert or delete appropriate number of elements to the vector to make it

given size (it has optional second argument to specify their value).
Posted by: Guest on May-10-2021

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