错误代码
#include <iostream>
#include <map>
using namespace std;
int main() {
std::map<int, std::string> head_shots;
head_shots[0] = "car0";
head_shots[1] = "car1";
head_shots[2] = "car2";
head_shots[3] = "car3";
head_shots[4] = "car4";
for (auto iter=head_shots.begin();
iter !=