set用法3删除

# include <iostream>
# include <set>

using namespace std;

typedef multiset<int> MSETINT;
int main(){

    MSETINT a;
    a.insert(67);
    a.insert(88);   
    a.insert(88);
    a.insert(123);
    a.insert(28);   

    //multiset元素的个数
    cout<<a.size()<<endl<<endl; 

    MSETINT::const_iterator i;
    for(i=a.begin();i!=a.end();i++){
        cout<<*i<<endl;
    } 
    cout<<endl;

    //erase删除某个元素 
    cout<<"输入删除的数据"<<endl;
    int num;
    cin>>num;
    a.erase(num); 

    for(i=a.begin();i!=a.end();i++){
        cout<<*i<<endl;
    } 
    cout<<endl;

    //清空
    a.clear();

    return 0;
}