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

0 vote148 views1 answer
Heroatx77
C++
5 votes129 views1 answer
Initialize vector to all zeros c++
C++
0 vote120 views2 answers
Easy way to encrypt a c++ file line by line
C++
11 votes124 views1 answer
Removing a character from a string in c++
C++
0 vote127 views1 answer
What c++ library is arccos in
C++
1 vote139 views1 answer
Multiply two numbers <=10^18 %m in cpp
C++
2 votes124 views2 answers
Strlen in c++
C++
0 vote125 views1 answer
Remove the jth object from the subset
C++
0 vote125 views1 answer
C++ fill array with 0
C++
1 vote139 views3 answers
Reverse string c++
C++