C++ vector size

#include <vector>

int main() {
  std::vector<int> myVector = { 666, 1337, 420 };
  
  size_t size = myVector.size(); // 3
  
  myVector.push_back(399); // Add 399 to the end of the vector
  
  size = myVector.size(); // 4
}

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;

-1

Source: stackoverflow.com

C++ define vector with size

#include <vector>

auto n = 20
// create a vector with n=20 integer elements
std::vector<int> arr(n);

-1

Similar codes

0 vote224 views1 answer
Heap allocated array in c ++
C++
0 vote231 views2 answers
Check prime cpp gfg
C++
3 votes219 views3 answers
Find all occurrences of a substring in a string c++
C++
0 vote211 views1 answer
Reading in lines from a file to a vector c++
C++
0 vote179 views1 answer
Interest rate parity
C++
0 vote222 views1 answer
Recherche sur les dangers de quelques matériaux
C++
0 vote221 views1 answer
Remove digit from number c++
C++
0 vote221 views1 answer
C++ pause linux
C++
6 votes249 views6 answers
If statement C++
C++
0 vote226 views1 answer
Hamming distance c++
C++