思維導圖

#include <iostream>
#include <vector>
#include <fstream>
using namespace std;class Stu
{friend ofstream &operator<<(ofstream &ofs,const Stu &stu);
private:string name;string id;int age;double score;
public:Stu(){}Stu(string name, string id, int age, double score):name(name),id(id),age(age),score(score){}~Stu(){}void show() const{cout << name << " " << id << " " << age << " " << score <<endl;}
};ofstream &operator<<(ofstream &ofs,const Stu &stu)
{ofs << "name:" << stu.name << " id:" << stu.id << " age:" << stu.age << " score:" << stu.score << endl;return ofs;
}int main()
{vector<Stu> s1;s1.push_back(Stu("yy","1001",19,97));vector<Stu> s2;s2.push_back(Stu("dd","1002",19,94));vector<Stu> s3;s3.push_back(Stu("hh","1003",20,96));ofstream ofs;ofs.open("D:\\Qt\\qt-project\\hq\\day8\\test6\\stu_txt",ios::out);for(const auto &stu : s1){ofs << stu << endl;}for(const auto &stu : s2){ofs << stu << endl;}for(const auto &stu : s3){ofs << stu << endl;}ofs.close();ifstream ifs;ifs.open("D:\\Qt\\qt-project\\hq\\day8\\test6\\stu_txt",ios::in);char buf[1024];while(ifs >> buf){cout << buf << endl;}ifs.close();return 0;
}

#include <iostream>
#include <list>using namespace std;void list_printf(list<int> &l)
{list<int>::iterator iter;for(iter = l.begin(); iter != l.end(); iter++){cout << *iter <<" ";}cout << endl;
}int main()
{list<int> l1;l1.push_back(10);l1.push_back(20);l1.push_back(30);l1.push_back(40);l1.push_back(50);cout << "l1:";list_printf(l1);l1.pop_back();list_printf(l1);cout << "==============" << endl;list<int> l2 = l1;cout << "l2:";list_printf(l2);cout << "==============" << endl;list<int> l3(l1.begin(),l1.end());cout << "l3:";list_printf(l3);cout << "==============" << endl;list<int> l4(6,6);cout << "l4:";list_printf(l4);l4.swap(l2);cout << "==============" << endl;cout << "l4:";list_printf(l4);cout << "l2:";list_printf(l2);cout << "==============" << endl;list<int> l5;l5.assign(l1.begin(),l1.end());cout << "l5:";list_printf(l5);cout << "==============" << endl;if(!l5.empty()){cout << l5.size() << endl;}l5.resize(7,9);list_printf(l5);l5.resize(3);list_printf(l5);cout << "==============" << endl;list<int> l6 = l4;cout << "l6:";list_printf(l6);l6.remove(20);list_printf(l6);l6.clear();list_printf(l6);return 0;
}