Screenplay: std::vector Basics

• Same as Screenplay: Pointer Arithmetic, And Algorithms, only with a std::vector<> instead of a gool old C array:

  code/vector-basic.cpp

  #include <vector>
  #include <iostream>
     
  int main()
  {
      std::vector<int> a;                // <--- C++98: initialization -> empty
      a.push_back(100);                  // <--- elements come during runtime
      a.push_back(200);                  // <--- ...
      a.push_back(300);                  // <--- ...
          
      for (size_t i=0; i<a.size(); ++i)  // <--- index based iteration
          std::cout << a[i] << std::endl;
  
      return 0;
  }
  

• Using C++11 brace initialization

  code/vector-basic-brace-init.cpp

  #include <vector>
  #include <iostream>
     
  int main()
  {
      std::vector<int> a = {100, 200, 300};  // <--- C++11 brace initialization
          
      for (size_t i=0; i<a.size(); ++i)      // <--- STILL index based iteration
          std::cout << a[i] << std::endl;
  
      return 0;
  }