define size vector c++ code example
Example 1: 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
}
Example 2: 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;