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 vote160 views1 answer
#include <stdio.h> cpp
C++
0 vote167 views1 answer
Show mouse c++
C++
0 vote181 views1 answer
How to turn an integer variable into a char c++
C++
0 vote217 views1 answer
For statement in c++
C++
10 votes142 views3 answers
Namespaces in c++
C++
0 vote166 views1 answer
Ifstream file (“code2.txt”); dev C++
C++
0 vote182 views1 answer
C++ tokenize string
C++
0 vote190 views1 answer
Constexpr std::round c++
C++
4 votes165 views1 answer
How to make i/o fast in c++
C++
3 votes144 views2 answers
C++ input integer
C++