C++ vector

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++ vector

#include <vector>
#include <string>

int main() {
  std::vector<std::string> str_v;
  str_v.push_back("abc");
  str_v.push_back("hello world!!");
  str_v.push_back("i'm a coder.");
  for(auto it = str_v.beigin();it != str_v.end(); it++) {
  	printf("%s\n",it->c_str());
  }
}

C++ vector

#include <vector>
#include <iostream>

int main ()
{
    std::vector<int>    v1;        // LINE I
    v1.push_back(10);            // LINE II
    std::cout<<v1.front()<<":"<<v1.back()<<std::endl;        // LINE III
    return 0;
}

//code compiles successfully

Vector keyword in c++

template < class T, class Alloc = allocator<T> > class vector;

Source: tutorialspoint.com

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