学生考试管理系统

本程序是用链表做的~因为是转载~不保证正确性./*头文件*/#include <>#include<>#include<> /*其它说明*/#include<> /*字符串函数*/#include<> /*内存操作函数*/#include<> /*字符操作函数*/#include<> /*动态地址分配函数*/#define LEN sizeof(STUDENT)typedef struct stu /*定义结构体数组用于缓存数据*/{char num[6];char name[5];int score[3];int sum;float average;int order;struct stu *next;}STUDENT;/*函数原型*/STUDENT *init(); /*初始化函数*/int menu_select(); /*菜单函数*/STUDENT *create(); /*创建链表*/void print(STUDENT *head); /* 显示全部记录*/void search(STUDENT *head); /*查找记录*/STUDENT *delete(STUDENT *head); /*删除记录*/STUDENT *sort(STUDENT *head); /*排序*/STUDENT *insert(STUDENT *head,STUDENT *new); /*插入记录*/void save(STUDENT *head); /*保存文件*/STUDENT *load(); /*读文件*//*主函数界面*/main(){STUDENT *head,new;head=init(); /*链表初始化,使head的值为NULL*/for(;;) /*循环无限次*/ {switch(menu_select()) { case 1:head=create();break; case 2:print(head);break; case 3:search(head);break; case 4:head=delete(head);break; case 5:head=sort(head);break; case 6:head=insert(head,&new);break; /*&new表示返回地址*/ case 7:save(head);break; case 8:head=load(); break; case 9:exit(0); /*如菜单返回值为9则程序结束*/ } }}/*初始化函数*/STUDENT *init(){return NULL; /*返回空指针*/}/*菜单选择函数*/menu_select(){int n;struct date d; /*定义时间结构体*/getdate(&d); /*读取系统日期并把它放到结构体d中*/printf("press any key to enter the menu......"); /*按任一键进入主菜单*/getch(); /*从键盘读取一个字符,但不显示于屏幕*/clrscr(); /*清屏*/printf("********************************************************************************\n");printf("\t\t Welcome to\n");printf("\n\t\t The student score manage system\n");printf("*************************************MENU***************************************\n");printf("\t\t\t1. Enter the record\n"); /*输入学生成绩记录*/printf("\t\t\t2. Print the record\n"); /*显示*/printf("\t\t\t3. Search record on name\n"); /*寻找*/printf("\t\t\t4. Delete a record\n"); /*删除*/printf("\t\t\t5. Sort to make new a file\n"); /*排序*/printf("\t\t\t6. Insert record to list\n"); /*插入*/printf("\t\t\t7. Save the file\n"); /*保存*/printf("\t\t\t8. Load the file\n"); /*读取*/printf("\t\t\t9. Quit\n"); /*退出*/printf("\n\t\t Made by Hu Haihong.\n");printf("********************************************************************************\n");printf("\t\t\t\t%d\\%d\\%d\n",); /*显示当前系统日期*/do{ printf("\n\t\t\tEnter your choice(1~9):"); scanf("%d",&n); }while(n<1||n>9); /*如果选择项不在1~9之间则重输*/ return(n); /*返回选择项，主函数根据该数调用相应的函数*/}/*输入函数*/STUDENT *create(){int i,s;STUDENT *head=NULL,*p; /* 定义函数.此函数带回一个指向链表头的指针*/clrscr();for(;;) {p=(STUDENT *)malloc(LEN); /*开辟一个新的单元*/ if(!p) /*如果指针p为空*/ {printf("\nOut of memory."); /*输出内存溢出*/ return (head); /*返回头指针,下同*/ } printf("Enter the num(0:list end):"); scanf("%s",p->num); if(p->num[0]=='0') break; /*如果学号首字符为0则结束输入*/ printf("Enter the name:"); scanf("%s",p->name); printf("Please enter the %d scores\n",3); /*提示开始输入成绩*/ s=0; /*计算每个学生的总分，初值为0*/ for(i=0;i<3;i++) /*3门课程循环3次*/ { do{ printf("score%d:",i+1); scanf("%d",&p->score[i]); if(p->score[i]<0 || p->score[i]>100) /*确保成绩在0~100之间*/ printf("Data error,please enter again.\n"); }while(p->score[i]<0 || p->score[i]>100); s=s+p->score[i]; /*累加各门成绩*/ } p->sum=s; /*将总分保存*/ p->average=(float)s/3; /*先用强制类型转换将s转换成float型,再求平均值*/ p->order=0; /*未排序前此值为0*/ p->next=head; /*将头结点做为新输入结点的后继结点*/ head=p; /*新输入结点为新的头结点*/ } return(head); }/* 显示全部记录函数*/void print(STUDENT *head){int i=0; /* 统计记录条数*/STUDENT *p; /*移动指针*/clrscr();p=head; /*初值为头指针*/printf("\n************************************STUDENT************************************\n");printf("-------------------------------------------------------------------------------\n");printf("| Rec | Num | Name | Sc1 | Sc2 | Sc3 | Sum | Ave | Order |\n");printf("-------------------------------------------------------------------------------\n");while(p!=NULL) { i++; printf("| %3d | %4s | %-4s | %3d | %3d | %3d | %3d | % | %-5d|\n", i, p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order); p=p->next; }printf("-------------------------------------------------------------------------------\n");printf("**************************************END**************************************\n");}/*查找记录函数*/void search(STUDENT *head){STUDENT *p; /* 移动指针*/char s[5]; /*存放姓名用的字符数组*/clrscr();printf("Please enter name for searching.\n");scanf("%s",s);p=head; /*将头指针赋给p*/while(strcmp(p->name,s) && p != NULL) /*当记录的姓名不是要找的，或指针不为空时*/ p=p->next; /*移动指针，指向下一结点*/ if(p!=NULL) /*如果指针不为空*/ {printf("\n*************************************FOUND************************************\n"); printf("-------------------------------------------------------------------------------\n"); printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n"); printf("-------------------------------------------------------------------------------\n"); printf("| %4s | %4s | %3d | %3d | %3d | %3d | % | %-5d|\n", p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order); printf("-------------------------------------------------------------------------------\n"); printf("***************************************END**************************************\n"); } else printf("\nThere is no num %s student on the list.\n",s); /*显示没有该学生*/}/*删除记录函数*/STUDENT *delete(STUDENT *head){int n;STUDENT *p1,*p2; /*p1为查找到要删除的结点指针，p2为其前驱指针*/char c,s[6]; /*s[6]用来存放学号,c用来输入字母*/clrscr();printf("Please enter the deleted num: ");scanf("%s",s);p1=p2=head; /*给p1和p2赋初值头指针*/while(strcmp(p1->num,s) && p1 != NULL) /*当记录的学号不是要找的，或指针不为空时*/ {p2=p1; /*将p1指针值赋给p2作为p1的前驱指针*/ p1=p1->next; /*将p1指针指向下一条记录*/ }if(strcmp(p1->num,s)==0) /*学号找到了*/ {printf("**************************************FOUND************************************\n"); printf("-------------------------------------------------------------------------------\n"); printf("| Num | Name | sc1 | sc2 | sc3 | Sum | Ave | Order |\n"); printf("-------------------------------------------------------------------------------\n"); printf("| %4s | %4s | %3d | %3d | %3d | %3d | % | %-5d|\n", p1->num,p1->name,p1->score[0],p1->score[1],p1->score[2],p1->sum,p1->average,p1->order); printf("-------------------------------------------------------------------------------\n"); printf("***************************************END**************************************\n"); printf("Are you sure to delete the student Y/N ?"); /*提示是否要删除,输入Y删除,N则退出*/ for(;;) {scanf("%c",&c); if(c=='n'||c=='N') break; /*如果不删除,则跳出本循环*/ if(c=='y'||c=='Y') { if(p1==head) /*若p1==head，说明被删结点是首结点*/ head=p1->next; /*把第二个结点地址赋予head*/ else p2->next=p1->next; /*否则将一下结点地址赋给前一结点地址*/ n=n-1; printf("\nNum %s student have been deleted.\n",s); printf("Don't forget to save.\n");break; /*删除后就跳出循环*/ } } } else printf("\nThere is no num %s student on the list.\n",s); /*找不到该结点*/return(head);}/*排序函数*/STUDENT *sort(STUDENT *head){int i=0; /*保存名次*/STUDENT *p1,*p2,*t,*temp; /*定义临时指针*/temp=head->next; /*将原表的头指针所指的下一个结点作头指针*/head->next=NULL; /*第一个结点为新表的头结点*/while(temp!=NULL) /*当原表不为空时，进行排序*/ { t=temp; /*取原表的头结点*/ temp=temp->next; /*原表头结点指针后移*/ p1=head; /*设定移动指针p1，从头指针开始*/ p2=head; /*设定移动指针p2做为p1的前驱，初值为头指针*/ while(t->averageaverage&&p1!=NULL) /*作成绩平均分比较*/ { p2=p1; /*待排序点值小，则新表指针后移*/ p1=p1->next; } if(p1==p2) /*p1==p2，说明待排序点值大，应排在首位*/ { t->next=p1; /*待排序点的后继为p*/ head=t; /*新头结点为待排序点*/ } else /*待排序点应插入在中间某个位置p2和p1之间，如p为空则是尾部*/ { t->next=p1; /*t的后继是p1*/ p2->next=t; /*p2的后继是t*/ } }p1=head; /*已排好序的头指针赋给p1，准备填写名次*/while(p1!=NULL) /*当p1不为空时，进行下列操作*/ { i++; /*结点序号*/ p1->order=i; /*将结点序号赋值给名次*/ p1=p1->next; /*指针后移*/ }printf("Sorting is sucessful.\n"); /*排序成功*/return (head);}/*插入记录函数*/STUDENT *insert(STUDENT *head,STUDENT *new){STUDENT *p0,*p1,*p2;int n,sum1,i;p1=head; /*使p1指向第一个结点*/p0=new; /*p0指向要插入的结点*/printf("\nPlease enter a new record.\n"); /*提示输入记录信息*/printf("Enter the num:");scanf("%s",new->num);printf("Enter the name:");scanf("%s",new->name);printf("Please enter the %d scores.\n",3);sum1=0; /*保存新记录的总分，初值为0*/for(i=0;i<3;i++) { do{ printf("score%d:",i+1); scanf("%d",&new->score[i]); if(new->score[i]>100||new->score[i]<0) printf("Data error,please enter again.\n"); }while(new->score[i]>100||new->score[i]<0); sum1=sum1+new->score[i]; /*累加各门成绩*/ }new->sum=sum1; /*将总分存入新记录中*/new->average=(float)sum1/3;new->order=0;if(head==NULL) /*原来的链表是空表*/ {head=p0;p0->next=NULL;} /*使p0指向的结点作为头结点*/else {while((p0->averageaverage)&&(p1->next!=NULL)) {p2=p1; /*使p2指向刚才p1指向的结点*/ p1=p1->next; /*p1后移一个结点*/ } if(p0->average>=p1->average) {if(head==p1)head=p0; /*插到原来第一个结点之前*/ else p2->next=p0; /*插到p2指向的结点之后*/ p0->next=p1;} else {p1->next=p0;p0->next=NULL;} /*插到最后的结点之后*/ }n=n+1; /*结点数加1*/head=sort(head); /*调用排序的函数,将学生成绩重新排序*/printf("\nStudent %s have been inserted.\n",new->name); printf("Don't forget to save the new file.\n");return(head);}/*保存数据到文件函数*/void save(STUDENT *head){FILE *fp; /*定义指向文件的指针*/STUDENT *p; /* 定义移动指针*/char outfile[10];printf("Enter outfile name,for example c:\\score\n");scanf("%s",outfile);if((fp=fopen(outfile,"wb"))==NULL) /*为输出打开一个二进制文件,为只写方式*/ { printf("Cannot open the file\n"); return; /*若打不开则返回菜单*/ }printf("\nSaving the file......\n");p=head; /*移动指针从头指针开始*/while(p!=NULL) /*如p不为空*/ { fwrite(p,LEN,1,fp); /*写入一条记录*/ p=p->next; /*指针后移*/ }fclose(fp); /*关闭文件*/printf("Save the file successfully!\n");}/* 从文件读数据函数*/STUDENT *load(){STUDENT *p1,*p2,*head=NULL; /*定义记录指针变量*/FILE *fp; /* 定义指向文件的指针*/char infile[10];printf("Enter infile name,for example c:\\score\n");scanf("%s",infile);if((fp=fopen(infile,"rb"))==NULL) /*打开一个二进制文件，为只读方式*/ { printf("Can not open the file.\n"); return(head); }printf("\nLoading the file!\n");p1=(STUDENT *)malloc(LEN); /*开辟一个新单元*/if(!p1) { printf("Out of memory!\n"); return(head); }head=p1; /*申请到空间，将其作为头指针*/while(!feof(fp)) /*循环读数据直到文件尾结束*/ { if(fread(p1,LEN,1,fp)!=1) break; /*如果没读到数据，跳出循环*/ p1->next=(STUDENT *)malloc(LEN); /*为下一个结点开辟空间*/ if(!p1->next) { printf("Out of memory!\n"); return (head); }p2=p1; /*使p2指向刚才p1指向的结点*/p1=p1->next; /*指针后移，新读入数据链到当前表尾*/ }p2->next=NULL; /*最后一个结点的后继指针为空*/fclose(fp);printf("You have success to read data from the file!\n");return (head);}

给一个我以前写过的吧，功能应该差不多

貌似这个题目已经做好几次了，你在知道里搜以下吧。