Declare vector of size n in c++

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

Declare vector of size n in c++

#include <vector>

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

-1

Similar codes

-1 vote307 views1 answer
Permutation c++
C++
0 vote360 views2 answers
Tu hi hai aashiqui song lyrics
C++
0 vote384 views1 answer
Make an x using asterisk c++
C++
1 vote309 views3 answers
How to get a random number between two numbers in c++
C++
1 vote296 views1 answer
Esp32 restart from code
C++
0 vote334 views2 answers
Private static c++
C++
1 vote322 views1 answer
C++ product of vector
C++
-1 vote303 views1 answer
Palindrome no example
C++
0 vote337 views1 answer
Bfs sudocode
C++
0 vote321 views1 answer
"StepFileGen1." cpp.o failed jetson nano
C++