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

0 vote294 views1 answer
Lap trinh file explorer c++
C++
3 votes297 views1 answer
Find in set of pairs using first value cpp
C++
0 vote302 views2 answers
GCD(x, yz)
C++
1 vote338 views1 answer
Preorder
C++
9 votes387 views3 answers
Max function in c++
C++
0 vote340 views1 answer
Bitmap rotate 90 deg
C++
0 vote330 views1 answer
Sinh nhi phan c++
C++
0 vote314 views1 answer
How to declare a 2D vector in c++ of size m*n with value 0
C++
0 vote314 views1 answer
Pros millis()
C++
0 vote295 views1 answer
Gcc suppress warning inline
C++