#include 
#include 

int main() {
  std::vector 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());
  }
}