list对象指针与指针类型list

 

#include <string>
#include <cctype>
#include <algorithm>
#include <iostream>
#include <list>
using namespace std;
class Base{
public:
        int data;
        Base(int y):data(y){}
};
Base *pt(int x){
        Base *tmp = new Base(x);
        return tmp;
}
int main()
{

        string str("ceshi andx 123 benjing");
        int x = 0;
        char first[6] = {0};
        char last[16] = {0};
        char mid[16] = {0};
        int ret = sscanf(str.c_str(), "%s%s%d%s", first, mid, &x, last);
        cout << ret <<  " first:" << first << " mid:" << mid << " x:" << x << " last:" << last << endl;

        //int指针类型的list
        list<int *> intptr;
        int *tmp = new int[5];
        for(int i=0; i<5; i++){
                tmp[i] = i;
                intptr.push_back(&tmp[i]);
        }
        list<int *>::iterator liter;
        for(liter  = intptr.begin(); liter != intptr.end(); ++liter)
                cout << **liter << endl;
        for (std::list<int*>::iterator it = intptr.begin(); it != intptr.end();it++)
        {
                //delete &it; //error
        }
        delete[] tmp;

        //以下list对象指针均建立在堆上，需要new/delete结合申请与释放
        //list元素为基本数据类型的对象指针      
        list<int> *ptr = new list<int>[2]; 
        ptr->push_back(2);
        ptr->push_back(3);
        list<int>::iterator iter;
        for(iter  = ptr->begin(); iter != ptr->end(); ++iter)
                cout << *iter << endl;
        delete[] ptr;
        //list元素为自定义类型的对象指针
        list<Base> *pBase = new list<Base>[5];
        Base ba(4);
        Base bb(5);
        pBase->push_back(ba);
        pBase->push_back(bb);
        list<Base>::iterator iterb;
        for(iterb  = pBase->begin(); iterb != pBase->end(); ++iterb)
                cout << (*iterb).data << endl;
        delete[] pBase;

}