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declare vector of size n in c++ Code Example
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;
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);



Cpp

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