STL练习程序（set...）

#include <iostream>

#include <string>

#include <set>

using namespace std;



int main()

{

    string name[]={"tian","dsp","su","chu"};

    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;

}