简单实现了一个学生成绩信息管理系统

来源：互联网发布：如何修改4g网络设置编辑：程序博客网时间：2024/04/27 13:24
要求：
1.该程序以链表的形式存储信息；
2.系统实现添加，查找，修改，删除，遍历操作的基本功能；
总结：
1.最大的问题没有建立一个管理系统的类，把各个功能当做管理类的成员函数，通过调用函数来操作，有待进一步改进！！！！
//************************************学生信息管理系统********************#include<stdlib.h>#include<string.h>#include<iostream>#include<conio.h>#include<stdio.h>#include<fstream>using namespace std;class stu{public:    stu ();         //构造函数    void show();        //显示学生信息    char num[20];    char name[20];    char score[10];public:    stu *next;    static int Count ;  //记录创建个数    int w ;     //存储创建次序};  int stu :: Count = 1 ;stu::stu()              {    cout<<"请输入第"<<Count<<"个学生的信息："<<endl;    cout<<"              姓名 =";    cin>>name;    cout<<"              学号 = ";    cin>>num;    cout<<"              成绩 =";    cin>>score;     w = Count;    Count++;}void stu::show(){    cout<<"第"<<w<<"个学生的信息为："<<endl;    cout<<"              姓名 ="<<name<<endl        <<"              学号 ="<<num<<endl        <<"              成绩 ="<<score<<endl;}//------------------------创建输入第一个信息----------------------------------------stu *create()       {    stu *head, *tail, *New;        cout<<"按任意键开始输入:"<<endl;        getch();        New = new stu;                  head = tail = New;        tail->next = 0;                 system("cls");        cout<<"录入完成!!!按任意键进入系统···"<<endl;        getch();        system("cls");        return head;}//-------------------------查找修改模块-------------------------------------------------------------stu *chazhao(stu *head){    fflush(stdin);    cout<<"按学号查找选：1  姓名查找选：2： "<<endl        <<"输入查找方式 = ";    int chance;    cin>>chance;switch (chance)    {    case 1:        {       char Num[20];                cout<<"要查找学生的学号为：";                cin>>Num;                stu *p = head;                for (p ; p ; p = p->next)                {                    if (strcmp(p->num , Num) == 0)                    {                        p->show();                        cout<<endl;                        cout<<"是否修改数据？Yes 1 No 0"<<endl;                        int chance;                        cin>>chance;                        if (chance)                        {                            cout<<"新学号为：";                            cin>>p->num;                            cout<<"修改姓名为：";                            cin>>p->name;                            cout<<"修改成绩为：";                            cin>>p->score;                            cout<<"修改成功！"<<endl;                            cout<<"按任意键继续···"<<endl;                            getch();                            return head;                        }                        else                        {                            return head;                        }                    }                               }                return head;         }    case 2:             {                char Name[20];                cout<<"要查找学生的姓名为：";                cin>>Name;                stu *p = head;                for ( ; p ; p = p->next)                {                    if (strcmp(p->name,Name) == 0)                    {                        p->show();                        cout<<endl;                        cout<<"是否修改数据？Yes 1 No 0"<<endl;                        int chance;                        cin>>chance;                        if (chance)                        {                            cout<<"新学号为：";                            cin>>p->num;                            cout<<"修改姓名为：";                            cin>>p->name;                            cout<<"修改成绩为：";                            cin>>p->score;                            cout<<"修改成功！"<<endl;                            cout<<"按任意键继续···"<<endl;                            getch();                            return head;                        }                        else                        {                            return head;                        }                    }                }            return head;        }    }}//------------------------------------遍历信息----------------------------stu *bianli(stu *head){    stu *p = head; int i = 1;    for (; p ;p = p->next)    {        p->show();        cout<<endl;    }    cout<<"按任意键继续···"<<endl;    getch();    return head;}//------------------------------------添加信息---------------------------------stu *tianjia(stu *head){    int flag;    cout<<"插入到第几个位置：";    fflush(stdin);    cin>>flag;    stu *p = head;    if (flag == 1)    {               stu *New = new stu;        New->next = head;        cout<<"添加成功！！"<<endl;        return New;    }    else    {        int i = 1;        while(i < flag - 1)        {            p = p->next;            ++i;        }        stu *New = new stu;        New->next = p->next;        p->next = New;        cout<<"添加成功！！"<<endl;        cout<<"按任意键继续···"<<endl;        getch();        return head;    }               for ( int i = 1 ;i == (flag - 1);  p = p->next,++i)        {                   stu *New = new stu;            New->next = p->next;            p->next = New;            cout<<"添加成功！！"<<endl;            cout<<"按任意键继续···"<<endl;            getch();            return head;                }}//----------------------------删除模块---------------------------------stu *shanchu(stu *head){//  system("cls");    fflush(stdin);    cout<<"删除操作："<<endl        <<"按学号查找选：1  按姓名查找选：2 "<<endl        <<"输入查找方式 = ";    int chance;    cin>>chance;switch (chance)    {    case 1:             {                char Num[20];                cout<<"要删除学生的学号为：";                cin>>Num;                stu *p = head;                int count = 1;                for (p ; p ;p = p->next, count++)                {                     if (strcmp(p->num , Num) == 0)                    {                        p->show();                        cout<<endl;                        cout<<"是否删除数据？Yes 1，No 0"<<endl;                        int chance;                        cin>>chance;                        if (chance)                        {                            if (p->next == 0)       //删除的为最后一个节点                            {                                int i = 1;                                p= head;                                                while (i < count - 1)                                {                                    p = p->next;                                    i++;                                }                            //  delete p->next;                                 p->next = NULL;                                stu::Count--;                                cout<<"删除成功！最后一个"<<endl;                                cout<<"按任意键继续···"<<endl;                                getch();                                return head;                            }                            else if (p == head)         //删除的第一个节点                            {                                stu *node = p->next;                                delete p;                                stu::Count--;                                cout<<"删除成功！第一个节点"<<endl;                                cout<<"按任意键继续···"<<endl;                                getch();                                return node;                            }                            else                    //删除中间节点                            {                                stu *node = p->next;                                strcpy(p->num ,node->num);                                strcpy(p->name ,node->name);                                strcpy(p->score,node->score);                                p->w =node->w;                                p->next = node->next;                                delete node;                                stu::Count--;                                cout<<"删除成功！中间节点"<<endl;                                cout<<"按任意键继续···"<<endl;                                getch();                                return head;                            }                        }                        else                        {                            return head;                        }                    }                               }                return head;             }    case 2:        {        char Name[20];        cout<<"要删除学生的学生姓名为：";        cin>>Name;        stu *p = head;        int count = 1;        for (p ; p ; p = p->next, count++)        {            if (strcmp(p->name ,Name) == 0)            {                p->show();                cout<<endl;                cout<<"是否删除数据？Yes 1，No 0"<<endl;                int chance;                cin>>chance;                if (chance)                {                    if (p->next == 0)       //删除的为最后一个节点                    {                        int i = 1;                        p= head;                                        while (i < count - 1)                        {                            p = p->next;                            i++;                        }                    //  delete p->next;                         p->next = NULL;                        stu::Count--;                        cout<<"删除成功！最后一个"<<endl;                        cout<<"按任意键继续···"<<endl;                        getch();                        return head;                    }                    else if (p == head)         //删除的第一个节点                    {                        stu *node = p->next;                        delete p;                        stu::Count--;                        cout<<"删除成功！第一个节点"<<endl;                        cout<<"按任意键继续···"<<endl;                        getch();                        return node;                    }                    else                    //删除中间节点                    {                        stu *node = p->next;                        strcpy(p->num ,node->num);                        strcpy(p->name ,node->name);                        strcpy(p->score,node->score);                        p->next = node->next;                        delete node;                        stu::Count--;                        cout<<"删除成功！中间节点"<<endl;                        cout<<"按任意键继续···"<<endl;                        getch();                        return head;                    }                }                else                {                    return head;                }            }                       }        return head;        }    }}//-----------------------------主函数-------------------------------------int main(){    stu *Head ;    int begin;      cout<<"                              "        <<"欢迎进入新系统"<<endl<<"按任意键进入···"<<endl;    int y = getch();    system("cls");    Head = create();    int x;    x = getchar();    while(x != 0)    {           cout<<"                                      "<<"菜单"<<endl            <<"                           1.查询修改          2.添加信息 "<<endl            <<"                           3.删除信息          4.遍历学生信息 "<<endl            <<"                           5.统计学生总个数    6.退出系统"<<endl                        <<"                                  选择操作: ";        cin>>x;        fflush(stdin);        switch(x)        {        case 1:            Head = chazhao(Head);            break;        case 2:            Head = tianjia(Head);            break;        case 3:            Head = shanchu(Head);            break;        case 4:            Head = bianli(Head);            break;        case 5:            cout<<"学生个数为："<<stu::Count-1<<endl;            break;        case 6:            return 0;        }    }    system("pause");}
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