C++ vector resize

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.

Source: tutorialspoint.com

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}

3d vector c++ resize

dp.resize(n+1,vector<vector<int>>(n+1,vector<int>(n+1,-1)));

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}

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).

Similar codes

0 vote100 views1 answer
Restart the computer in c++ after the default time (30) seconds. (Windows)
C++
0 vote96 views1 answer
How To Calculate 1+1 in c++
C++
0 vote159 views1 answer
Opencv compile c++
C++
0 vote118 views1 answer
What is imposter syndrome
C++
1 vote120 views10 answers
C++ to python converter online
C++
0 vote101 views1 answer
Uint16_t does not name a type
C++
0 vote97 views1 answer
Vector keyword in c++
C++
6 votes96 views1 answer
Convert string to stream c++
C++
1 vote107 views1 answer
Argument for c11 in c++
C++
2 votes118 views2 answers
Resize 2d vector c++
C++