STL练习程序（set...）

#include <iostream>
#include <string>
#include <set>
using namespace std;

int main()
{
    string name[]={"tian","dsp","sp","ti"};
    set<string> setname;

    for (int i=0;i<4;i++)
        setname.insert(name[i]);

    set<string>::iterator it;
    for (it=setname.begin();it!=setname.end();it++)
        cout<<*it<<"  ";

    it=setname.find("dsp");
    cout<<endl;
    cout<<*it<<endl;

    setname.erase(it);
    for (it=setname.begin();it!=setname.end();it++)
        cout<<*it<<"  ";

    cout<<endl<<setname.size()<<endl<<endl;

    for (int i=0;i<4;i++)
        if (setname.count(name[i])>0)
            cout<<name[i]<<" in set"<<endl;
        else
            cout<<name[i]<<" not in set"<<endl;

    setname.clear();
    if (setname.empty())
        cout<<"empty"<<endl;

    system("pause");
    return 0;
}