C++ define vector with 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

C++ define vector with size

#include <vector>

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

-1

Similar codes

0 vote287 views1 answer
Cpp Case value is not a constant expression
C++
3 votes237 views1 answer
(a) one-dimensional arrays and multidimensional arrays in c++
C++
6 votes314 views1 answer
C++ if in equivalent
C++
1 vote246 views1 answer
Name one example of a “decider” program that you regularly encounter in real life.
C++
-1 vote286 views4 answers
Inline function in c++
C++
1 vote261 views1 answer
Have unique vector after sorting vector
C++
15 votes279 views4 answers
C++ random
C++
0 vote270 views1 answer
Std::set remove item
C++
0 vote282 views1 answer
C++ typedef template class
C++
0 vote240 views1 answer
Destin'y child
C++