運行效果

?

D:wangcCLionProjects	est1212cmake-build-debug	est1212.exe

????????????????????????????????????????????????【學生管理系統2.0】
????????????????★————————————————————————————————————————★

???????????????????????????|?1.?信息錄入????????????????2.?成績錄入?????????????3.?信息查詢??|

???????????????????????????|?4.?成績查詢????????????????5.?刪除信息?????????????6.?信息追加??|

???????????????????????????|?7.?更改分數????????????????8.?查看排名?????????????9.?成績分段??|

???????????????????????????|?10.保存文件????????????????11.文件輸出?????????????12.文件導入??|

????????????????★————————————————按0并回車退出——————————————————★
請輸入執行數字:1
*****************************************************信息錄入***********************************************************
依次鍵入學號、姓名、性別、宿舍號碼、電話號碼，用一個【空格】隔開各數據,每一條輸入完成后按回車鍵進行下一條輸入。
?????????????????????????????????????????????【退出請輸入'0'并回車】

樣例:
541913460230?張三?男?1717?66666
在此輸入:
1001?張三豐?男?521?888888
1001?張三豐?男?521?888888

1002?李四?男?522?555555
1002?李四?男?522?555555


0
0
請輸入執行數字:3
請在此輸入:1002
1002
輸入了錯誤的第一次選擇數字！重新輸入:
3
3
輸入了錯誤的第一次選擇數字！重新輸入:
0
0
輸入了錯誤的第一次選擇數字！重新輸入:
1
1
通過學號(輸入1),姓名(輸入2):1
1

輸入學號(輸入0并回車結束):1001
1001
學號:1001?姓名:張三豐?性別:男?宿舍號碼:521?電話號碼:888888

輸入學號(輸入0并回車結束):

?

源碼

?

#include
#include
#include
#include
#define?LEN?sizeof(struct?student)
struct?student
{
????char?num[20];//學號
????char?name[20];//姓名
????char?sex[20];//性別
????char?room[20];//宿舍號碼
????char?tel[20];//電話號碼

????char?CHN[20];//語文
????char?MATH[20];//數學
????char?ENG[20];//英語
????char?PE[20];//體育
????char?PRO[20];//專業
????char?average_score[20];//平均分

????struct?student?*next;
};
int?n;//節點數

struct?student?*creat();//信息錄入
void?score(struct?student?*head);//成績錄入
void?findinformation(struct?student?*head);//信息查詢
void?findscore(struct?student?*head);//成績查詢
struct?student?*del(struct?student?*head);//信息刪除
struct?student?*insert(struct?student?*head);//信息插入
void?update(struct?student?*head);//修改分數
void?Oscore(struct?student*head);//排序輸出
void?swap(struct?student*p1,struct?student*p2);//交換數據
void?fenduan(struct?student*head);//分段輸出
int?checknum(char?ch[]);//檢查純數字的數據里是否混入了非數字的非法輸入
int?transformint(char?ch[]);//純數字整數(字符串轉向int類型)
void?save(struct?student?*head);?//文件存儲
void?export1();//文件輸出
struct?student?*import();//文件導入
int?checkscore(char?ch[]);//檢查分數是否為0-99的純數字
int?IncludeChinese(char?*str);?//檢查性名、性別是否包含漢字
int?main()
{
????//微信關注公眾號：C語言中文社區，免費領取更多
????struct?student?*head=NULL;
????char?choose[20];
????menu://設置主菜單的點
????printf("
");
????printf("						【學生管理系統2.0】					
");
????printf("		★————————————————————————————————————————★

");
????printf("			???|?1.?信息錄入		2.?成績錄入		3.?信息查詢??|

");
????printf("			???|?4.?成績查詢		5.?刪除信息		6.?信息追加??|

");
????printf("			???|?7.?更改分數		8.?查看排名		9.?成績分段??|

");
????printf("			???|?10.保存文件		11.文件輸出		12.文件導入??|

");
????printf("		★————————————————按0并回車退出——————————————————★
");
????printf("請輸入執行數字:");
????while(scanf("%s",choose)&&checknum(choose)==0)//檢查到不是純數字?讓用戶重新輸入
????{
????????printf("輸入無效，重新輸入:");
????}
????switch(transformint(choose))
????{
????????case?1:
????????????head=creat();
????????????break;
????????case?2:
????????????score(head);
????????????break;
????????case?3:
????????????findinformation(head);
????????????break;
????????case?4:
????????????findscore(head);
????????????break;
????????case?5:
????????????head=del(head);
????????????break;
????????case?6:
????????????head=insert(head);
????????????break;
????????case?7:
????????????update(head);
????????????break;
????????case?8:
????????????Oscore(head);
????????????break;
????????case?9:
????????????fenduan(head);
????????????break;
????????case?10:
????????????save(head);
????????????break;
????????case?11:
????????????export1();
????????????break;
????????case?12:
????????????head=import();
????????????break;
????}
????if(transformint(choose)<0||transformint(choose)>12)//輸入了不在執行數字范圍內的數字返回主菜單的點
????{
????????system("cls");//清理屏幕和緩沖區
????????fflush(stdin);
????????goto?menu;
????}
????if(transformint(choose)!=0)//輸入不是0，繼續回到主菜單
????{
????????goto?menu;
????}
????system("cls");//結束時清理屏幕和緩沖區，打印下方的校徽
????fflush(stdin);
????printf("
感謝使用！
");
????printf("
?????????????????????????????????????????????????????*
");
????printf("????????????????????????????????????????????????*??***??****
");
????printf("??????????????????????????????????????????????***?****?****
");
????printf("?????????????????????????????????????????????****?****?****?****
");
????printf("?????????????????????????????????????????????****?****?****?****
");
????printf("?????????????????????????????????????????????****?****?****?****
");
????printf("?????????????????????????????????????????????****?****?****?****
");
????printf("?????????????????????????????????????????????****?****?****?****
");
????printf("??????????????????????????????????????????????****?*******?****
");
????printf("????????????????????????????????????????????????*************
");
????printf("????????????????????????????????????????????????????*****
");
????system("pause");
????return?0;
}

struct?student?*creat()//錄入信息，創建鏈表
{
????system("cls");
????fflush(stdin);
????printf("*****************************************************信息錄入***********************************************************
");
????printf("依次鍵入學號、姓名、性別、宿舍號碼、電話號碼，用一個【空格】隔開各數據,每一條輸入完成后按回車鍵進行下一條輸入。?????????
");
????printf("?????????????????????????????????????????????【退出請輸入'0'并回車】?????????????????????????????????????????????????????
");
????printf("樣例:
541913460230?張三?男?1717?66666
在此輸入:
");
????n=0;
????struct?student?*head,*p1,*p2;
????head?=?NULL;
????p1=p2=(struct?student*)malloc(LEN);

????while(scanf("%s",p1->num)&&checknum(p1->num)==0)
????{
????????printf("輸入錯誤的學號，重新輸入:
");
????}
????if(transformint(p1->num)==0)//輸入了0退出函數調用，傳回去表頭指針head給主函數的head
????{
????????system("cls");
????????fflush(stdin);
????????return(head);
????}
????while(scanf("%s",p1->name)&&IncludeChinese(p1->name)==0)//這幾行while(scanf)都是具有容錯的輸入，整個程序中都存在輸入容錯！！！
????{
????????printf("輸入錯誤的名字，重新輸入:
");
????}
????while(scanf("%s",p1->sex)&&IncludeChinese(p1->sex)==0)
????{
????????printf("輸入錯誤的性別，重新輸入:
");
????}
????while(scanf("%s",p1->room)&&checknum(p1->room)==0)
????{
????????printf("輸入錯誤的宿舍號碼，重新輸入:
");
????}
????while(scanf("%s",p1->tel)&&checknum(p1->tel)==0)
????{
????????printf("輸入錯誤的手機號碼，重新輸入:
");
????}
????printf("
");
????while(transformint(p1->num)!=0)//輸入每個節點的學號不是0的時候開始循環。
????{
????????n+=1;//節點+1
????????if(n==1)????//PS:此處為建立鏈表常規過程(參考了譚浩強C程序設計第九章鏈表，紅皮那本)
????????{
????????????head=p1;//第一個節點?表頭指向上面開辟的第一個節點?p1?p2?head都指向此處此時
????????}else
????????{
????????????p2->next=p1;//后面的節點，p2的next指向p1將兩個節點連接到一起
????????????p2=p1;//p2再跟p1
????????}
????????p1=(struct?student*)malloc(LEN);//p1指向開辟的新節點
????????while(scanf("%s",p1->num)&&checknum(p1->num)==0)
????????{
????????????printf("輸入錯誤的學號，重新輸入:
");
????????}
????????if(transformint(p1->num)==0)
????????{
????????????break;
????????}
????????while(scanf("%s",p1->name)&&IncludeChinese(p1->name)==0)
????????{
????????????printf("輸入錯誤的名字，重新輸入:
");
????????}
????????while(scanf("%s",p1->sex)&&IncludeChinese(p1->sex)==0)
????????{
????????????printf("輸入錯誤的性別，重新輸入:
");
????????}
????????while(scanf("%s",p1->room)&&checknum(p1->room)==0)
????????{
????????????printf("輸入錯誤的宿舍號碼，重新輸入:
");
????????}
????????while(scanf("%s",p1->tel)&&checknum(p1->tel)==0)
????????{
????????????printf("輸入錯誤的手機號碼，重新輸入:
");
????????}
????????printf("

");
????}
????p2->next=NULL;//最后p1開辟的新節點丟棄了，讓p2的next指向空，形成表尾結束鏈表。?錄入結束
????system("cls");
????fflush(stdin);
????return(head);
}

void?score(struct?student?*head)//拿到鏈表,錄入成績
{
????system("cls");
????fflush(stdin);
????printf("*****************************************************成績錄入***********************************************************
");
????printf("依次鍵入語文、數學、英語、體育、專業成績，用一個空格隔開各數據,每一條輸入完成后按回車鍵進行下一條輸入。
");
????printf("??????????????????????????????????????????????【錄完分數后自動退出】??????????????????????????????????????????????????????
");
????printf("例如:
10?20?30?40?50
在此輸入:
");

????int?Aver;//平均分
????struct?student?*p;
????for(p=head;p!=NULL;p=p->next)//遍歷鏈表
????{
????????printf("
現在錄入%s（%s）的成績
",p->name,p->num);
????????while(scanf("%s",p->CHN)&&checkscore(p->CHN)==0)
????????{
????????????printf("輸入錯誤的語文分數，重新輸入:
");
????????}
????????while(scanf("%s",p->MATH)&&checkscore(p->MATH)==0)
????????{
????????????printf("輸入錯誤的數學分數，重新輸入:
");
????????}
????????while(scanf("%s",p->ENG)&&checkscore(p->ENG)==0)
????????{
????????????printf("輸入錯誤的英語分數，重新輸入:
");
????????}
????????while(scanf("%s",p->PE)&&checkscore(p->PE)==0)
????????{
????????????printf("輸入錯誤的體育分數，重新輸入:
");
????????}
????????while(scanf("%s",p->PRO)&&checkscore(p->PRO)==0)
????????{
????????????printf("輸入錯誤的專業分數，重新輸入:
");
????????}
????????Aver=(transformint(p->CHN)+transformint(p->MATH)+transformint(p->ENG)+transformint(p->PE)+transformint(p->PRO))/5;
????????itoa(Aver,p->average_score,10);//Aver十進制形式轉化為字符串存儲在鏈表的average_score平均分里
????????printf("%s的成績錄入完了
",p->name);
????}
????system("cls");
????fflush(stdin);
}

void?findinformation(struct?student?*head)//學生信息查詢
{
????system("cls");
????fflush(stdin);
????char?choose1[20],choose2[20];//兩個選擇的地方，choose1選擇學號/姓名?or?宿舍號?，choose2在選擇了學號/姓名時選擇?學號?or?姓名
????char?num[20]={'1'};//用戶即將輸入的學號
????char?name[20];//用戶即將輸入的姓名
????char?room[20]={'1'};//用戶即將輸入的宿舍號
????struct?student?*p;
????p=head;
????int?flag=0;
????printf("*****************************************************信息查詢***********************************************************
");
????printf("
選擇查找方式,學號/姓名查找(輸入1),宿舍號(輸入2)
請在此輸入:");
????choosestation1://第一次選擇的點
????fflush(stdin);
????while(scanf("%s",choose1)&&checknum(choose1)==0)
????{
????????printf("輸入無效，重新輸入:
");
????}
????if(transformint(choose1)==1)
????{
????????printf("通過學號(輸入1),姓名(輸入2):");
????????choosestation2://第二次選擇的點
????????fflush(stdin);
????????while(scanf("%s",choose2)&&checknum(choose2)==0)
????????{
????????????printf("輸入無效，重新輸入:
");
????????}
????????if(transformint(choose2)==1)
????????{
????????????while(transformint(num)!=0)
????????????{
????????????????printf("
輸入學號(輸入0并回車結束):");
????????????????while(scanf("%s",num)&&checknum(num)==0)
????????????????{
????????????????????printf("輸入錯誤的學號，重新輸入:
");
????????????????}
????????????????for(p=head;p!=NULL;p=p->next)
????????????????{
????????????????????if(transformint(p->num)==transformint(num))
????????????????????{
????????????????????????printf("學號:%s?姓名:%s?性別:%s?宿舍號碼:%s?電話號碼:%s
",p->num,p->name,p->sex,p->room,p->tel);
????????????????????????flag=1;
????????????????????????break;
????????????????????}
????????????????}
????????????????if(flag==0&&transformint(num)!=0)
????????????????{
????????????????????printf("未找到此學生信息
");
????????????????}
????????????}
????????}else?if(transformint(choose2)==2)
????????{
????????????while(name[0]!='#')
????????????{
????????????????printf("
輸入姓名(輸入#并回車結束):");
????????????????scanf("%s",name);
????????????????for(p=head;p!=NULL;p=p->next)//遍歷鏈表
????????????????{
????????????????????if(strcmp(p->name,name)==0)//比較兩字符串
????????????????????{
????????????????????????printf("學號:%s?姓名:%s?性別:%s?宿舍號碼:%s?電話號碼:%s
",p->num,p->name,p->sex,p->room,p->tel);
????????????????????????flag=1;
????????????????????????break;
????????????????????}
????????????????}
????????????????if(flag==0&&name[0]!='#')
????????????????{
????????????????????printf("未找到此學生信息！
");
????????????????}
????????????}
????????}else
????????{
????????????printf("輸入了錯誤的第二次選擇數字！重新輸入:
");
????????????goto?choosestation2;//返回上面第二次選擇的點
????????}
????}else?if(transformint(choose1)==2)
????{
????????while(transformint(room)!=0)
????????{
????????????printf("
輸入宿舍號(輸入0并回車結束):");
????????????while(scanf("%s",room)&&checknum(room)==0)
????????????{
????????????????printf("輸入錯誤的宿舍號碼，重新輸入:
");
????????????}
????????????for(p=head;p!=NULL;p=p->next)
????????????{
????????????????if(p->room==room)
????????????????{
????????????????????printf("學號:%s?姓名:%s?性別:%s?宿舍號碼:%s?電話號碼:%s
",p->num,p->name,p->sex,p->room,p->tel);
????????????????????flag=1;
????????????????????break;
????????????????}
????????????}
????????????if(flag==0&&transformint(room)!=0)
????????????{
????????????????printf("未找到此學生信息！
");
????????????}
????????}
????}else
????{
????????printf("輸入了錯誤的第一次選擇數字！重新輸入:
");
????????goto?choosestation1;//返回最上面第一次選擇的點
????}
????system("cls");
????fflush(stdin);
}

void?findscore(struct?student?*head)//成績查詢
{
????system("cls");
????fflush(stdin);
????char?num[20]={'1'};//初始化用戶即將輸入的學號
????struct?student?*p;
????int?flag=0;//學號是否找到的標志，1找到0沒找到
????p=head;
????printf("*****************************************************成績查詢***********************************************************
");
????printf("因為有重名的可能，暫時只能通過學號進行查詢。請輸入學號并回車進行查詢!
");
????printf("???????????????????????????????????????????????【退出請輸入'0'并回車】????????????????????????????????????????????????????
");
????while(transformint(num)!=0)
????{
????????printf("
輸入學號:");
????????while(scanf("%s",num)&&checknum(num)==0)
????????{
????????????printf("輸入錯誤的學號，重新輸入:
");
????????}
????????for(p=head;p!=NULL;p=p->next)
????????{
????????????if(transformint(p->num)==transformint(num))
????????????{
????????????????printf("學號:%s 姓名:%s 語文：%s 數學：%s 英語：%s 體育：%s 專業：%s 
",p->num,p->name,p->CHN,p->MATH,p->ENG,p->PE,p->PRO);
????????????????flag=1;
????????????????break;
????????????}
????????}
????????if(flag==0)
????????{
????????????printf("學號未找到！
");
????????}
????}
????system("cls");
????fflush(stdin);
}

struct?student?*del(struct?student?*head)//刪除信息函數
{
????system("cls");
????fflush(stdin);
????char?num[20]={'1'};//用戶即將輸入的學號
????struct?student?*p1,*p2;
????printf("*****************************************************信息刪除***********************************************************
");
????if(head?==?NULL)
????{
????????system("cls");
????????fflush(stdin);
????????return(head);
????}
????printf("
***************************************輸入學號進行刪除學生信息(輸入0結束)**********************************************
");
????do{
????????printf("
請輸入學號:");
????????while(scanf("%s",num)&&checknum(num)==0)
????????{
????????????printf("輸入錯誤的學號，重新輸入:
");
????????}
????????if(transformint(num)==0)
????????{
????????????break;
????????}
????????p1=p2=head;
????????while(transformint(num)!=transformint(p1->num)&&p1->next!=NULL)
????????{
????????????p2=p1;
????????????p1=p1->next;
????????}
????????if(transformint(num)==transformint(p1->num))//找到數字
????????{
????????????if(p1==head)//如果是要刪開頭的節點，直接改變表頭指向第二個節點，讓第二個節點成為新的表頭，原來的頭用free釋放掉
????????????{
????????????????head=p1->next;
????????????????free(p1);
????????????}else//如果刪后面的節點，要把p2連到p1所在節點后面的一個節點，將p1所在節點free釋放掉
????????????{
????????????????p2->next=p1->next;
????????????????free(p1);
????????????}
????????????printf("已刪除學號為%s的信息",num);
????????????n=n-1;
????????}else
????????{
????????????printf("沒有找到學號為%s的學生
",num);
????????}
????}while(transformint(num)!=0);
????system("cls");
????fflush(stdin);
????return(head);
}

struct?student?*insert(struct?student?*head)//插入信息函數
{
????system("cls");
????fflush(stdin);
????printf("*****************************************************信息追加***********************************************************
");
????printf("????????????????????????????????????????????【加入一組信息后自動退出】??????????????????????????????????????????????????
");
????printf("請按照?學號?姓名?性別?宿舍號碼?電話號碼?語文?數學?英語?體育?專業?順序輸入
");
????printf("樣例:
542013460658?李四?男?1206?10086?10?20?30?40?50
");
????int?Aver;
????struct?student?*stud=(struct?student*)malloc(LEN);//開辟一個單元，這一塊存我們追加的信息，后面的操作把這一塊連接到鏈表的表頭
????stud->next=NULL;
????stud->next=head;
????head=stud;
????while(scanf("%s",stud->num)&&checknum(stud->num)==0)
????{
????????printf("輸入錯誤的學號，重新輸入:
");
????}
????while(scanf("%s",stud->name)&&IncludeChinese(stud->name)==0)
????{
????????printf("輸入錯誤的名字，重新輸入:
");
????}
????while(scanf("%s",stud->sex)&&IncludeChinese(stud->sex)==0)
????{
????????printf("輸入錯誤的性別，重新輸入:
");
????}
????while(scanf("%s",stud->room)&&checknum(stud->room)==0)
????{
????????printf("輸入錯誤的宿舍號碼，重新輸入:
");
????}
????while(scanf("%s",stud->tel)&&checknum(stud->tel)==0)
????{
????????printf("輸入錯誤的電話號碼，重新輸入:
");
????}
????while(scanf("%s",stud->CHN)&&checkscore(stud->CHN)==0)
????{
????????printf("輸入錯誤的語文分數，重新輸入:
");
????}
????while(scanf("%s",stud->MATH)&&checkscore(stud->MATH)==0)
????{
????????printf("輸入錯誤的數學分數，重新輸入:
");
????}
????while(scanf("%s",stud->ENG)&&checkscore(stud->ENG)==0)
????{
????????printf("輸入錯誤的英語分數，重新輸入:
");
????}
????while(scanf("%s",stud->PE)&&checkscore(stud->PE)==0)
????{
????????printf("輸入錯誤的體育分數，重新輸入:
");
????}
????while(scanf("%s",stud->PRO)&&checkscore(stud->PRO)==0)
????{
????????printf("輸入錯誤的專業分數，重新輸入:
");
????}
????Aver=(transformint(stud->CHN)+transformint(stud->MATH)+transformint(stud->ENG)+transformint(stud->PE)+transformint(stud->PRO))/5;//計算平均分
????itoa(Aver,stud->average_score,10);
????n=n+1;?//節點+1
????system("cls");
????fflush(stdin);
????return(head);
}

void?update(struct?student?*head)//修改分數
{
????system("cls");
????fflush(stdin);
????int?Aver;
????struct?student?*p1,*p2;
????char?num[20]={'1'};//用戶即將輸入的學號
????char?choose[20];
????printf("*****************************************************分數修改***********************************************************
");
????if(head?==?NULL)//沒有錄信息?空表直接返回
????{
????????system("cls");
????????fflush(stdin);
????????return;
????}
????printf("
***************************************輸入學號進行修改學生分數(輸入0結束)**********************************************
");
????do{
????????printf("
請輸入學號:");
????????while(scanf("%s",num)&&checknum(num)==0)
????????{
????????????printf("輸入錯誤的學號，重新輸入:
");
????????}
????????if(transformint(num)==0)
????????{
????????????break;
????????}
????????p1=p2=head;
????????while(transformint(p1->num)!=transformint(num)&&p1->next!=NULL)//沒找到，往后走
????????{
????????????p2=p1;
????????????p1=p1->next;
????????}
????????if(transformint(p1->num)==transformint(num))//找到了，開始選修改的科目
????????{
????????????printf("修改語文請輸入1,數學輸入2,英語3,體育4,專業5
");
????????????printf("請輸入修改科目對應的數字:");
????????????while(scanf("%s",choose)&&checknum(choose)==0||transformint(choose)<1||transformint(choose)>5)
????????????{
????????????????printf("輸入無效的編號，重新輸入:
");
????????????}
????????????printf("請輸入修改后的分數:");
????????????switch(transformint(choose))
????????????{
????????????????case?1:
????????????????????while(scanf("%s",p1->CHN)&&checknum(p1->CHN)==0)
????????????????????{
????????????????????????printf("輸入錯誤的語文分數，重新輸入:
");
????????????????????}
????????????????????break;
????????????????case?2:
????????????????????while(scanf("%s",p1->MATH)&&checknum(p1->MATH)==0)
????????????????????{
????????????????????????printf("輸入錯誤的數學分數，重新輸入:
");
????????????????????}
????????????????????break;
????????????????case?3:
????????????????????while(scanf("%s",p1->ENG)&&checknum(p1->ENG)==0)
????????????????????{
????????????????????????printf("輸入錯誤的英語分數，重新輸入:
");
????????????????????}
????????????????????break;
????????????????case?4:
????????????????????while(scanf("%s",p1->PE)&&checknum(p1->PE)==0)
????????????????????{
????????????????????????printf("輸入錯誤的體育分數，重新輸入:
");
????????????????????}
????????????????????break;
????????????????case?5:
????????????????????while(scanf("%s",p1->PRO)&&checknum(p1->PRO)==0)
????????????????????{
????????????????????????printf("輸入錯誤的專業分數，重新輸入:
");
????????????????????}
????????????????????break;
????????????}
????????????Aver=(transformint(p1->CHN)+transformint(p1->MATH)+transformint(p1->ENG)+transformint(p1->PE)+transformint(p1->PRO))/5;
????????????itoa(Aver,p1->average_score,10);//平均分轉換字符串形式
????????}else
????????{
????????????printf("沒有找到學號為%s的學生
",num);
????????}
????}while(transformint(num)!=0);
????system("cls");
????fflush(stdin);
}

void?Oscore(struct?student*head)//排序輸出
{
????system("cls");
????fflush(stdin);
????printf("*****************************************************查看排名***********************************************************
");
????int?ranking=0;
????struct?student?*p=NULL,*p1=NULL;
????for(p=head;p!=NULL;p=p->next)
????{
????????if(checkscore(p->average_score)==0)
????????{
????????????printf("有同學只錄取了信息，沒有錄成績。所以無法公布排名
");
????????????system("pause");
????????????system("cls");
????????????fflush(stdin);
????????????return;
????????}
????}
????for(p=head;p!=NULL;p=p->next)
????{
????????for(p1=p->next;p1!=NULL;p1=p1->next)
????????{
????????????if(transformint(p->average_score)average_score))
????????????{
????????????????swap(p,p1);
????????????}
????????}
????}
????printf("學號		姓名		平均分		名次	語文	數學	英語	體育	專業	
");
????for(p=head;p!=NULL;p=p->next)
????{
????????ranking+=1;
????????printf("%s		%s		%s		%d	%s	%s	%s	%s	%s	
",p->num,p->name,p->average_score,ranking,p->CHN,p->MATH,p->ENG,p->PE,p->PRO);
????}
????printf("
");
????system("pause");
????system("cls");
????fflush(stdin);
}

void?swap(struct?student*p1,struct?student*p2)//交換數據（輔助函數）
{
????char?tempCHN[20];
????char?tempMATH[20];
????char?tempENG[20];
????char?tempPE[20];
????char?tempPRO[20];
????char?tempaverage[20];
????char?tempname[20];
????char?tempnum[20];

????strcpy(tempnum,p1->num);///
????strcpy(p1->num,p2->num);
????strcpy(p2->num,tempnum);
????strcpy(tempname,p1->name);//
????strcpy(p1->name,p2->name);
????strcpy(p2->name,tempname);
????strcpy(tempCHN,p1->CHN);///
????strcpy(p1->CHN,p2->CHN);
????strcpy(p2->CHN,tempCHN);
????strcpy(tempMATH,p1->MATH);///
????strcpy(p1->MATH,p2->MATH);
????strcpy(p2->MATH,tempMATH);
????strcpy(tempENG,p1->ENG);///
????strcpy(p1->ENG,p2->ENG);
????strcpy(p2->ENG,tempENG);
????strcpy(tempPE,p1->PE);///
????strcpy(p1->PE,p2->PE);
????strcpy(p2->PE,tempPE);
????strcpy(tempPRO,p1->PRO);///
????strcpy(p1->PRO,p2->PRO);
????strcpy(p2->PRO,tempPRO);
????strcpy(tempaverage,p1->average_score);///
????strcpy(p1->average_score,p2->average_score);
????strcpy(p2->average_score,tempaverage);
}

void?fenduan(struct?student*head)//分段輸出
{
????system("cls");
????fflush(stdin);
????printf("*****************************************************成績分段***********************************************************

");
????struct?student?*p;
????for(p=head;p!=NULL;p=p->next)
????{
????????if(checkscore(p->average_score)==0)
????????{
????????????printf("有同學只錄取了信息，沒有錄成績。所以無法公布分段
");
????????????system("pause");
????????????system("cls");
????????????fflush(stdin);
????????????return;
????????}
????}
????printf("********************************************************A***************************************************************
");
????printf("學號		姓名		平均分		語文	數學	英語	體育	專業	
");
????for(p=head;p!=NULL;p=p->next)
????{
????????if(transformint(p->average_score)>=80)
????????{
????????????printf("%s		%s		%s		%s	%s	%s	%s	%s	
",p->num,p->name,p->average_score,p->CHN,p->MATH,p->ENG,p->PE,p->PRO);
????????}
????}
????printf("********************************************************B***************************************************************
");
????printf("學號		姓名		平均分		語文	數學	英語	體育	專業	
");
????for(p=head;p!=NULL;p=p->next)
????{
????????if(transformint(p->average_score)<80&&transformint(p->average_score)>=60)
????????{
????????????printf("%s		%s		%s		%s	%s	%s	%s	%s	
",p->num,p->name,p->average_score,p->CHN,p->MATH,p->ENG,p->PE,p->PRO);
????????}
????}
????printf("********************************************************C***************************************************************
");
????printf("學號		姓名		平均分		語文	數學	英語	體育	專業	
");
????for(p=head;p!=NULL;p=p->next)
????{
????????if(transformint(p->average_score)<60)
????????{
????????????printf("%s		%s		%s		%s	%s	%s	%s	%s	
",p->num,p->name,p->average_score,p->CHN,p->MATH,p->ENG,p->PE,p->PRO);
????????}
????}
????printf("
");
????system("pause");
????system("cls");
????fflush(stdin);
}



void?save(struct?student?*head)//文件保存
{
????system("cls");
????fflush(stdin);
????FILE?*fp;
????struct?student?*p;
????fp=fopen("stu.db","wb");

????for(p=head;p!=NULL;p=p->next)
????{
????????fwrite(p,LEN,1,fp);
????}
????fclose(fp);
????printf("保存完畢
");
????system("pause");
????system("cls");
????fflush(stdin);
}

void?export1()//文件輸出
{
????system("cls");
????fflush(stdin);
????FILE?*fp;
????struct?student?*t;
????t=(struct?student?*)malloc(LEN);
????if((fp=fopen("stu.db","r"))==NULL){
????????printf("未找到文件
");
????}
????else{
????????printf("學號		姓名		平均分		語文	數學	英語	體育	專業	
");
????????int?w;
????????fseek(fp,0,2);
????????w=ftell(fp);
????????fseek(fp,0,0);
????????while(w!=ftell(fp)){
????????????fread(t,LEN,1,fp);
????????????printf("%s		%s		%s		%s	%s	%s	%s	%s	
",t->num,t->name,t->average_score,t->CHN,t->MATH,t->ENG,t->PE,t->PRO);
????????}
????????fclose(fp);
????}
????system("pause");
????system("cls");
????fflush(stdin);
}

struct?student?*import()//文件導入
{
????system("cls");
????fflush(stdin);
????FILE?*fp;
????if((fp=fopen("stu.db","r"))==NULL){
????????printf("未找到文件
");
????}
????else{
????????struct?student?*p1,*p2,*head;
????????p1=p2=(struct?student?*)malloc(LEN);
????????fread(p1,LEN,1,fp);
????????while(!feof(fp))?{//end?of?file
????????????n+=1;
????????????if(n==1){
????????????????head=p1;
????????????}
????????????else{
????????????????p2->next=p1;
????????????}
????????????p2=p1;
????????????p1=(struct?student?*)malloc(LEN);
????????????fread(p1,LEN,1,fp);
????????}
????????p2->next=NULL;
????????fclose(fp);
????????printf("文件導入成功
");
????????system("pause");
????????system("cls");
????????fflush(stdin);
????????return?head;
????}
????system("cls");
????fflush(stdin);
????return?NULL;
}

int?checknum(char?ch[])//檢查純數字的數據里是否混入了非數字的非法輸入；
{
????int?i,flag=1;
????for(i=0;i'9')
????????{
????????????flag=0;
????????????break;
????????}
????}
????return?flag;
}

int?checkscore(char?ch[])//檢查0-99分數
{
????int?i,flag=1;
????if(strlen(ch)>=3)
????{
????????return?0;
????}
????for(i=0;i'9')
????????{
????????????flag=0;
????????????break;
????????}
????}
????return?flag;
}

int?IncludeChinese(char?*str)//是否包含中文
{
????char?c;
????while(1)
????{
????????c=*str++;
????????if?(c==0)?break;??//如果到字符串尾則說明該字符串沒有中文字符
????????if?(c&0x80)????????//如果字符高位為1且下一字符高位也是1則有中文字符
????????????if?(*str?&?0x80)?return?1;
????}
????return?0;
}

int?transformint(char?ch[])//純數字整數(字符串轉向int類型)
{
????int?i=0,sum=0;
????for(i=0;i



	　　審核編輯：湯梓紅