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 vote272 views4 answers
C++ template
C++
14 votes186 views6 answers
Cout c++
C++
0 vote204 views1 answer
Apply pca to dataframe
C++
15 votes212 views3 answers
C++ string to char array
C++
0 vote216 views1 answer
C++ split string by several space
C++
0 vote201 views1 answer
All usefull stls in cpp imports
C++
1 vote210 views1 answer
Prime numbers less than a given number c++
C++
0 vote216 views1 answer
Check if cin got the wrong type
C++
2 votes219 views1 answer
C++ custom compare in set
C++
11 votes214 views6 answers
How to take input in 2d vector in c++
C++