c++第一次用類,複製構造函數和操作符重載,STL寫學生管理系統,,可惜沒用繼承多態(不知道哪裏可以用 - _-)
寫這麼長代碼,想了很久沒思路,看了看別人代碼思路,自己也寫了這個簡單的管理系統
自己用到了C++11新語法,vs2010以下編譯器不會通過
STL的sort和(Greate<T>())均不會用,於是百度其用法,感謝百度,感謝度娘
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time:2015 1月13日 0:15分
代碼:343行
by:隱無影
*******************************************************************
#include<iostream>
#include<fstream>//文件輸入輸出流頭文件
#include<list>//鏈表
#include<string>
#include<functional>//適配器
#include <algorithm>//算法
#include<windows.h>
using namespace std;
class Student//定義student類
{
public:
string name;
string ID;
int grade;
Student() //無參構造函數 //無初始化
{
grade = 0;
}
Student(string &pname, string &pid, int &pgrade)//有參構造函數
{
this->name = pname;
this->ID = pid;
this->grade = pgrade;
}
Student(const Student &st1)//拷貝構造函數
{
this->name = st1.name;
this->ID = st1.ID;
this->grade = st1.grade;
}
Student &operator=(const Student &st1)//重載=
{
this->name = st1.name;
this->ID = st1.ID;
this->grade = st1.grade;
}
bool operator==(const Student &st1)const//重載==
{
return (grade == st1.grade) ? 1 : 0;
}
bool operator<(const Student &st1)const
{
return (grade <st1.grade) ? 1 : 0;
}
bool operator>(const Student &st1)const
{
return (grade>st1.grade) ? 1 : 0;
}
public:
void print()
{
cout << "name :" << name << endl;
cout << "ID :" << ID << endl;
cout << "grade :" << grade << endl;
cout << "-----------" << endl;
}
};
list<Student> mylist;//學生鏈表
void print(list<Student> &zlist)
{
auto it = zlist.begin();//c++11先語法
for (it; it != zlist.end(); ++it)
{
it->print();
}
}
void show()//主菜單
{
cout << "+++++++++++++++++++++++++++++++++++++++++"<<endl;
cout << "+++++++++++1.無影搜索+++++++++++" << endl;
cout << "+++++++++++2.小曾排序+++++++++++" << endl;
cout << "+++++++++++3.新童鞋加入+++++++++++" << endl;
cout << "+++++++++++4.刪除壞蛋+++++++++++" << endl;
cout << "+++++++++++5.360顯示+++++++++++" << endl;
cout << "+++++++++++6.超級保存+++++++++++" << endl;
cout << "+++++++++++7.無影清屏+++++++++++" << endl;
cout << "+++++++++++8.退出曾BB系統+++++++++++" << endl;
cout << "++++++++++++++++++++++++++++++++++++++++" << endl;
}
void xianshi()
{
system("cls");
cout << "****************************************" << endl;
cout << " 1----------按學號查詢----------" << endl;
cout << " 2----------按姓名查詢----------" << endl;
cout << " 3----------按成績查詢----------" << endl;
cout << " 4----------返回" << endl;
cout << "****************************************" << endl;
}
//查找學號
void findxuehao()
{
int flag = 0;
cout << "曾BB提示輸入學號" << std::endl;
string str1;
cin >> str1;
auto it = mylist.begin();
for (; it != mylist.end(); ++it)
{
if (str1 == it->ID)
{
cout << "找到該童鞋" << std::endl;
it->print();
flag = 1;
break;
}
}
if (flag == 0)
{
std::cout << "沒找到,請百度哦" << std::endl;
}
}
//查找名字
void findmingzi()
{
int flag = 0;
cout << "曾BB提示輸入名字" << std::endl;
string str1;
cin >> str1;
auto it = mylist.begin();
for (; it != mylist.end(); ++it)
{
if (str1 == it->name)
{
cout << "找到該童鞋" << std::endl;
it->print();
flag = 1;
break;
}
}
if (flag == 0)
{
std::cout << "沒找到,請百度哦" << std::endl;
}
}
//分數查找
void findfenshu()
{
int flag = 0;
cout << "曾BB提示輸入分數" << std::endl;
int num;
cin >> num;
auto it = mylist.begin();
for (; it != mylist.end(); ++it)
{
if (num == it->grade)
{
cout << "找到該童鞋" << std::endl;
it->print();
flag = 1;
break;
}
}
if (flag == 0)
{
std::cout << "沒找到,請百度哦" << std::endl;
}
}
//排序
void sortpaixu() //這裏還有些不明白
{
system("cls");
cout << "分數排序完畢" << std::endl;
mylist.sort(greater<Student>());
auto it = mylist.begin();
for (; it != mylist.end(); ++it)
{
it->print();
}
}
//插入一個學生
void insert()
{
system("cls");
cout << "學號多少" << endl;
string str1;
cin >> str1;
cout << "姓名多少" << endl;
string str2;
cin >> str2;
cout << "分數呵呵,你懂得" << endl;
int num;
cin >> num;
Student one(str2, str1, num);
mylist.push_back(one);
//std::cout << mylist.size() << endl;
std::cout << "要不要再顯示呢 y or n" << endl;
char ch;
cin >> ch;
if (ch == 'y')
{
for (auto it= mylist.begin(); it != mylist.end(); ++it)
{
(it)->print();
}
}
else
{
std::cout << "那就算了吧,下次哇" << endl;
Sleep(2000);
system("cls");
}
}
//刪除學生
void deletest()
{
system("cls");
cout << "請輸入要刪除的學生" << endl;
string str1;
cin >> str1;
int flag = 0;
for (auto it = mylist.begin(); it != mylist.end(); it++)
{
if (str1 == it->ID)
{
std::cout << "找到該學生" << std::endl;
it->print();
mylist.erase(it);
cout << "刪除OK" << endl;
flag = 1;
}
break;
}
if (flag == 0)
{
std::cout << "沒有找到" << std::endl;
}
}
//存儲文件
void savefile()
{
system("cls");
ofstream ofile("student.dat", ios::out);
if (!ofile)
{
std::cout << "文件打開失敗" << std::endl;
return ;
}
for (auto it = mylist.begin(); it != mylist.end(); ++it)
{
ofile << it->name << ' ' << it->ID << ' ' << it->grade << endl;
}
std::cout << "ok" << endl;
}
//讀出文件
void duchu()
{
ifstream ifle("student.dat");
if (!ifle)
{
std::cout << "文件打開失敗" << endl;
}
for (auto it = mylist.begin(); it != mylist.end(); ++it)
{
string str1, str2;
int num;
ifle >> str1 >> str2 >> num;
std::cout << "名字 " << str1 << endl;
std::cout << "學號" << str2 << endl;
std::cout << "成績" << num << endl;
}
}
int main()
{
cout << "----------------歡迎進入曾BB學生管理系統------------------" << endl;
MessageBoxA(NULL, "歡迎歡迎,熱烈歡迎", "曾哥歡迎", 1);
char ch;
show();
while (cin >> ch)
{
switch (ch)
{
case'1'://搜索
xianshi();
while (cin >> ch)
{
int flag = 0;
switch (ch)
{
case'1':
findxuehao(); break;
case'2':
findmingzi(); break;
case '3':
findfenshu(); break;
case'4':
flag = 1;
break;
default:
flag = 1;
break;
}
if (flag == 1)
{
break;
}
}
break;
case'2':
sortpaixu(); break;//排序
case'3':
insert(); break;//增加
case'4':
deletest(); break;//刪除
case'5':
print(mylist); break;//輸出
case'6':
savefile(); break;//存儲
case'7':
system("cls"); break;//清除
case'8':
return 0;
default:
return 0;
}
show();
}
cout << "=======曾BB系統要和你說byebye嘍" << endl;
system("pause");
return 0;
}
