C++ create vector of size

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++ initialize vector of vector with size

vector<vector<int>> v(10, vector<int>(10));

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 vote207 views1 answer
Write a code that adds two number
C++
0 vote176 views1 answer
How to loop through a set of pairs in c++
C++
-1 vote144 views1 answer
Dynamic 2d array c++
C++
2 votes168 views1 answer
Runtime Error: Runtime ErrorBad memory access (SIGBUS)
C++
0 vote177 views1 answer
Kadane algo
C++
5 votes173 views3 answers
Sql server convert utc to pst SQL command
C++
5 votes238 views4 answers
Pointers in c++
C++
1 vote182 views1 answer
Binary exponentiation modulo m
C++
36 votes243 views3 answers
How to type hello world in c++
C++
0 vote181 views1 answer
Appending string in c++
C++