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

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

1 vote143 views2 answers
C++ function as paramter
C++
2 votes148 views1 answer
How to use string variable in switch case in c++
C++
9 votes360 views3 answers
C++ find element in vector
C++
2 votes154 views2 answers
C++ while true loop
C++
6 votes145 views3 answers
Print float up to 3 decimal places in c++
C++
0 vote415 views1 answer
Cpp Case value is not a constant expression
C++
0 vote138 views1 answer
C++ program for inflation rate of two numbers
C++
0 vote137 views1 answer
Infix to prefix using cpp linked list program
C++
0 vote136 views1 answer
C function as paramter
C++
7 votes155 views1 answer
Vector concat c++
C++