代码如下:
/*
5. set & multiset
*/ set<string> cities{
"Braunschweig", "Hanover", "Frankfurt", "New York",
"Chicago", "Toronto", "Paris", "Frankfurt"
};
multiset<string> dup_cities {
"Braunschweig", "Hanover", "Frankfurt", "New York",
"Chicago", "Toronto", "Paris", "Frankfurt"
};
cout << "cities before:" << endl;
ContainerUtil<set<string>>::printElements(cities);
ContainerUtil<multiset<string>>::printElements(dup_cities); cities.insert({ "London", "Munich", "Hanover", "Braunschweig" });
dup_cities.insert({ "London", "Munich", "Hanover", "Braunschweig" });
cout << "cities after:" << endl;
ContainerUtil<set<string>>::printElements(cities);
ContainerUtil<multiset<string>>::printElements(dup_cities);
运行结果:
cities before:
Braunschweig Chicago Frankfurt Hanover New York Paris Toronto
Braunschweig Chicago Frankfurt Frankfurt Hanover New York Paris Toronto
cities after:
Braunschweig Chicago Frankfurt Hanover London Munich New York Paris Toronto
Braunschweig Braunschweig Chicago Frankfurt Frankfurt Hanover Hanover London Munich New York Paris Toronto