W3School TIY Editor

#include <iostream> #include <set> using namespace std; int main() { // 创建包含重复元素的集合 (BMW 出现两次) set<string> cars = {"Volvo", "BMW", "Ford", "BMW", "Tesla"}; // 打印集合元素 for (string car : cars) { cout << car << "\n"; } return 0; }