学生学籍管理系统

struct student{int num;char name[20];char sex[20];int dornum;char phone[10];struct student * next;};struct gradeinform{int num;char classnum[5];char classname[20];int credit;int Ugrade;int Egrade;int Jgrade;float Sgrade;float Rgrade;struct gradeinform * next;};void menu(struct student * s_list,struct gradeinform * g_list);struct student * Aread();struct gradeinform * Bread();void save(struct student * s_list,struct gradeinform * g_list);void search(struct student * s_list,struct gradeinform * g_list);void Asearch(struct student * s_list,struct gradeinform * g_list);void A1search(struct student * s_list,struct gradeinform * g_list);void A2search(struct student * s_list,struct gradeinform * g_list);void Bsearch(struct student * s_list,struct gradeinform * g_list);void B1search(struct student * s_list,struct gradeinform * g_list);struct student * dele(struct student * s_list,struct gradeinform * g_list);struct student * arrange(struct student * s_list,struct gradeinform * g_list); struct student * Auparrange(struct student * s_list,struct gradeinform * g_list); struct student * Buparrange(struct student * s_list,struct gradeinform * g_list); struct student * Adnarrange(struct student * s_list,struct gradeinform * g_list); struct student * Bdnarrange(struct student * s_list,struct gradeinform * g_list);void Aexchange(struct student * p1,struct student * p2);void Bexchange(struct gradeinform * p3,struct gradeinform * p4);struct student * Ainsert(struct student * node,struct student * s_list); //插入学生基本信息节点struct gradeinform * Binsert(struct gradeinform * node,struct gradeinform * g_list); //插入学生成绩信息节点struct student * Acreat(); //创建单个节点保存学生基本信息struct gradeinform * Bcreat(); //创建单个节点保存学生成绩信息void Clear(struct student * s_list,struct gradeinform * g_list); //清空链表struct student * Ainput(struct student * s_list); //输入学生基本信息struct gradeinform * Binput(struct gradeinform * g_list); //输入学生成绩信息void output(struct student * s_list,struct gradeinform * g_list); //显示所有学生信息void outputone(struct student * s_list,struct gradeinform * g_list); //显示单个学生全部信息信息void output1(struct student * s_list); //显示单个学生基本信息#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"void main(){struct student * s_list=NULL;struct gradeinform * g_list=NULL;s_list=Aread();g_list=Bread();menu(s_list,g_list);}void menu(struct student * s_list,struct gradeinform * g_list){int n;do{printf("\n\n");printf("\t\t****************学生学籍管理系统****************\n\n");printf("\t\t学生基本信息文件读取---------------------------1\n");printf("\t\t学生成绩信息文件读取---------------------------2\n");printf("\t\t文件保存---------------------------------------3\n\n");printf("\t\t************************************************\n\n");printf("\t\t输入新学生信息---------------------------------4\n");printf("\t\t显示所有学生信息-------------------------------5\n\n");printf("\t\t************************************************\n\n");printf("\t\t数据查询---------------------------------------6\n");printf("\t\t数据删除---------------------------------------7\n");printf("\t\t数据排序---------------------------------------8\n\n");printf("\t\t************************************************\n\n");printf("\t\t退出系统---------------------------------------0\n\n");printf("\t\t************************************************\n\n");printf("请输入：");scanf("%d",&n);printf("\n");switch(n){case 1 : s_list=Aread(); break;case 2 : g_list=Bread(); break;case 3 : save(s_list,g_list); break;case 4 : s_list=Ainput(s_list),g_list=Binput(g_list);break;case 5 : output(s_list,g_list);break;case 6 : search(s_list,g_list); break;case 7 : dele(s_list,g_list); break;case 8 : arrange(s_list,g_list); break;case 0 : save(s_list,g_list),Clear(s_list,g_list);printf("\n\n再见！\n\n"); break;}}while(n!=0);}//数据查询void search(struct student * s_list,struct gradeinform * g_list){int n;printf("\n");printf("\t\t\t***********查询功能***********\n\n");printf("\t\t\t学生基本情况查询-------------1\n");printf("\t\t\t成绩查询---------------------2\n\n");printf("\t\t\t******************************\n\n");printf("请输入：");scanf("%d",&n);printf("\n");switch(n){case 1 : Asearch(s_list,g_list); break;case 2 : Bsearch(s_list,g_list); break;}if(n!=1&&n!=2)menu(s_list,g_list);}void Asearch(struct student * s_list,struct gradeinform * g_list){int n;printf("\t\t\t********学生基本情况查询********\n\n");printf("\t\t\t按学号或姓名查询---------------1\n");printf("\t\t\t按宿舍号码查询-----------------2\n\n");printf("\t\t\t********************************\n\n");printf("请输入：");scanf("%d",&n);printf("\n");switch(n){case 1 : A1search(s_list,g_list); break;case 2 : A2search(s_list,g_list); break;}if(n!=1&&n!=2)menu(s_list,g_list);}void Bsearch(struct student * s_list,struct gradeinform * g_list){B1search(s_list,g_list);}//数据排序struct student * arrange(struct student * s_list,struct gradeinform * g_list) {int n;printf("\n\n");printf("\t\t\t********学生信息排序********\n\n");printf("\t\t\t按综合成绩升序排列---------1\n");printf("\t\t\t按实得学分升序排列---------2\n");printf("\t\t\t按综合成绩降序排列---------3\n");printf("\t\t\t按实得学分降序排列---------4\n\n");printf("\t\t\t****************************\n\n");printf("请输入：");scanf("%d",&n);printf("\n");switch(n){case 1 : Auparrange(s_list,g_list); break;case 2 : Buparrange(s_list,g_list); break;case 3 : Adnarrange(s_list,g_list); break;case 4 : Bdnarrange(s_list,g_list); break;}if(n<1||n>4)menu(s_list,g_list);return s_list;}/*int dele(){int n;printf("\t\t\t******按学号或姓名删除信息******\n\n");printf("\t\t\t按学号删除---------------------1\n");printf("\t\t\t按姓名删除---------------------2\n");printf("\t\t\t********************************\n\n");printf("请输入：");scanf("%d",&n);return n;}*/#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * Ainsert(struct student * node,struct student * s_list) //插入学生基本信息节点{struct student * p1;struct student * p2;p1=p2=s_list;if(s_list==NULL){s_list=node;s_list->next=NULL;return s_list;}else{while(p1!=NULL){p2=p1;p1=p1->next;}p2->next=node;node->next=NULL;return s_list;}return s_list;}struct gradeinform * Binsert(struct gradeinform * node,struct gradeinform * g_list) //插入学生成绩信息节点{struct gradeinform * p1;struct gradeinform * p2;p1=p2=g_list;if(g_list==NULL){g_list=node;g_list->next=NULL;return g_list;}else{while(p1!=NULL){p2=p1;p1=p1->next;}p2->next=node;node->next=NULL;return g_list;}return g_list;}struct student * Acreat() //创建单个节点保存学生基本信息{struct student *node=NULL;if((node=(struct student *)malloc(sizeof(struct student)))==NULL){printf("内存不足，请释放内存之后重试！");return NULL;}memset(node,0,sizeof(struct student));return node;}struct gradeinform * Bcreat() //创建单个节点保存学生成绩信息{struct gradeinform *node=NULL;if((node=(struct gradeinform *)malloc(sizeof(struct gradeinform)))==NULL) {printf("内存不足，请释放内存之后重试！");return NULL;}memset(node,0,sizeof(struct gradeinform));return node;}void Aexchange(struct student * p1,struct student * p2){int num;char name[20];char sex[20];int dornum;char phone[10];num = p1->num;p1->num = p2->num;p2->num = num;strcpy(name,p1->name);strcpy(p1->name,p2->name);strcpy(p2->name,name);strcpy(sex,p1->sex);strcpy(p1->sex,p2->sex);strcpy(p2->sex,sex);dornum = p1->dornum;p1->dornum = p2->dornum;p2->dornum = dornum;strcpy(phone,p1->phone);strcpy(p1->phone,p2->phone);strcpy(p2->phone,phone);}void Bexchange(struct gradeinform * p3,struct gradeinform * p4) {int num;char classnum[5];char classname[20];int credit;int Ugrade;int Egrade;int Jgrade;float Sgrade;float Rgrade;num = p3->num;p3->num = p4->num;p4->num = num;strcpy(classnum,p3->classnum);strcpy(p3->classnum,p4->classnum);strcpy(p4->classnum,classnum);strcpy(classname,p3->classname);strcpy(p3->classname,p4->classname);strcpy(p4->classname,classname);credit = p3->credit;p3->credit = p4->credit;p4->credit = credit;Ugrade = p3->Ugrade;p3->Ugrade = p4->Ugrade;p4->Ugrade = Ugrade;Egrade = p3->Egrade;p3->Egrade = p4->Egrade;p4->Egrade = Egrade;Jgrade = p3->Jgrade;p3->Jgrade = p4->Jgrade;p4->Jgrade = Jgrade;Sgrade = p3->Sgrade;p3->Sgrade = p4->Sgrade;p4->Sgrade = Sgrade;Rgrade = p3->Rgrade;p3->Rgrade = p4->Rgrade;p4->Rgrade = Rgrade;}void Clear(struct student * s_list,struct gradeinform * g_list) //清空链表{struct student *p1, *p2;struct gradeinform *p3, *p4;p1=s_list;p3=g_list;while(p1!=NULL){p2=p1->next;free(p1);p1=p2;}while(p3!=NULL){p4=p3->next;free(p3);p3=p4;}}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"void A1search(struct student * s_list,struct gradeinform * g_list) //学生基本情况查询---按学号或姓名查询{int n;printf("\t\t\t********按学号或姓名查询********\n\n");printf("\t\t\t按学号查询---------------------1\n");printf("\t\t\t按姓名查询---------------------2\n");printf("\t\t\t********************************\n\n");printf("请输入：");scanf("%d",&n);if(n==1){int num;struct student * p=s_list;struct gradeinform * q=g_list;printf("请输入学生学号：");scanf("%d",&num);for(;p!=NULL&&q!=NULL;){if(p->num == num){break;}p=p->next;q=q->next;}if(p==NULL&&q==NULL){printf("该学生不存在！\n");menu(s_list,g_list);}if(p!=NULL&&q!=NULL){output1(p);}}if(n==2){char name[20];struct student * p=s_list;struct gradeinform * q=g_list;printf("请输入学生姓名：");fflush(stdin);gets(name);for(;p!=NULL&&q!=NULL;){if(strcmp(p->name,name)==0){break;}p=p->next;q=q->next;}if(p==NULL&&q==NULL){printf("该学生不存在！\n");menu(s_list,g_list);}if(p!=NULL&&q!=NULL){output1(p);}}if(n!=1&&n!=2){menu(s_list,g_list);}}void A2search(struct student * s_list,struct gradeinform * g_list) //学生基本情况查询---按宿舍号码查询{int dornum;struct student * p=s_list;struct gradeinform * q=g_list;printf("请输入宿舍号码：");scanf("%d",&dornum);while(p!=NULL){for(;p!=NULL&&q!=NULL;){if(p->dornum == dornum){break;}p=p->next;q=q->next;}if(p!=NULL&&q!=NULL){output1(p);p=p->next;q=q->next;}}}void B1search(struct student * s_list,struct gradeinform * g_list) //按成绩查询{int num;struct student * p=s_list;struct gradeinform * q=g_list;printf("请输入学生学号：");scanf("%d",&num);for(;p!=NULL&&q!=NULL;){if(p->num == num){break;}p=p->next;q=q->next;}if(p==NULL&&q==NULL){printf("该学生不存在！\n");menu(s_list,g_list);}if(p!=NULL&&q!=NULL){outputone(p,q);}}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * Auparrange(struct student * s_list,struct gradeinform * g_list) //实现按综合成绩升序排列并显示数据{struct student * p1;struct student * p2;p1=p2=s_list->next;struct gradeinform * p3;struct gradeinform * p4;p3=p4=g_list->next;while(p3!=NULL&&p1!=NULL){for(;p4!=NULL&&p2!=NULL;){if(p3->Sgrade > p4->Sgrade){Bexchange(p3,p4);Aexchange(p1,p2);}p4=p4->next;p2=p2->next;}p3=p3->next;p4=p3;p1=p1->next;p2=p1;}return s_list;}struct student * Buparrange(struct student * s_list,struct gradeinform * g_list) //实现按实得学分升序排列并显示数据{struct student * p1;struct student * p2;p1=p2=s_list->next;struct gradeinform * p3;struct gradeinform * p4;p3=p4=g_list->next;while(p3!=NULL&&p1!=NULL){for(;p4!=NULL&&p2!=NULL;){if(p3->Rgrade > p4->Rgrade){Bexchange(p3,p4);Aexchange(p1,p2);}p4=p4->next;p2=p2->next;}p3=p3->next;p4=p3;p1=p1->next;p2=p1;}return s_list;}struct student * Adnarrange(struct student * s_list,struct gradeinform * g_list) //实现按综合成绩降序排列并显示数据{struct student * p1;struct student * p2;p1=p2=s_list->next;struct gradeinform * p3;struct gradeinform * p4;p3=p4=g_list->next;while(p3!=NULL&&p1!=NULL){for(;p4!=NULL&&p2!=NULL;){if(p3->Sgrade < p4->Sgrade){Bexchange(p3,p4);Aexchange(p1,p2);}p4=p4->next;p2=p2->next;}p3=p3->next;p4=p3;p1=p1->next;p2=p1;}return s_list;}struct student * Bdnarrange(struct student * s_list,struct gradeinform * g_list) //实现按实得学分降序排列并显示数据{struct student * p1;struct student * p2;p1=p2=s_list->next;struct gradeinform * p3;struct gradeinform * p4;p3=p4=g_list->next;while(p3!=NULL&&p1!=NULL){for(;p4!=NULL&&p2!=NULL;){if(p3->Rgrade < p4->Rgrade){Bexchange(p3,p4);Aexchange(p1,p2);}p4=p4->next;p2=p2->next;}p3=p3->next;p4=p3;p1=p1->next;p2=p1;}return NULL;}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * dele(struct student * s_list,struct gradeinform * g_list) //当在A.TXT中删除一个学生时，自动地在B.TXT中删除此人所有信息{int n;printf("\t\t\t******按学号或姓名删除信息******\n\n");printf("\t\t\t按学号删除---------------------1\n");printf("\t\t\t按姓名删除---------------------2\n");printf("\t\t\t********************************\n\n");printf("请输入：");scanf("%d",&n);if(n==1){int num;struct student * p1;struct student * p2;struct gradeinform * p3;struct gradeinform * p4;p1=p2=s_list;p3=p4=g_list;printf("请输入学生学号：");scanf("%d",&num);for(;p1!=NULL&&p3!=NULL;){if(p1->num == num)break;p2=p1;p1=p1->next;p4=p3;p3=p3->next;}if(p1==p2){s_list=p2->next;g_list=p4->next;}if(p1!=p2&&p1->next!=NULL){p2->next=p1->next;p4->next=p3->next;}if(p1!=p2&&p1->next==NULL){p2->next=NULL;p4->next=NULL;}return s_list;}if(n==2){char name[20];struct student * p1;struct student * p2;struct gradeinform * p3;struct gradeinform * p4;p1=p2=s_list;p3=p4=g_list;printf("请输入学生姓名：");fflush(stdin);gets(name);for(;p1!=NULL&&p3!=NULL;){if(strcmp(p1->name,name)==0)break;p2=p1;p1=p1->next;p4=p3;p3=p3->next;}if(p1==NULL){printf("抱歉，查无此人！");return s_list;}if(p1==p2){s_list=p2->next;g_list=p4->next;}if(p1!=p2&&p1->next!=NULL){p2->next=p1->next;p4->next=p3->next;}if(p1!=p2&&p1->next==NULL){p2->next=NULL;p4->next=NULL;}// free(p1);// free(p2);// free(p3);// free(p4);return s_list;}if(n!=1&&n!=2){menu(s_list,g_list);}}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * dele(struct student * s_list,struct gradeinform * g_list) //当在A.TXT中删除一个学生时，自动地在B.TXT中删除此人所有信息{int n;printf("\t\t\t******按学号或姓名删除信息******\n\n");printf("\t\t\t按学号删除---------------------1\n");printf("\t\t\t按姓名删除---------------------2\n");printf("\t\t\t********************************\n\n");printf("请输入：");scanf("%d",&n);if(n==1){int num;struct student * p1;struct student * p2;struct gradeinform * p3;struct gradeinform * p4;p1=p2=s_list;p3=p4=g_list;printf("请输入学生学号：");scanf("%d",&num);for(;p1!=NULL&&p3!=NULL;){if(p1->num == num)break;p2=p1;p1=p1->next;p4=p3;p3=p3->next;}if(p1==p2){s_list=p2->next;g_list=p4->next;}if(p1!=p2&&p1->next!=NULL){p2->next=p1->next;p4->next=p3->next;}if(p1!=p2&&p1->next==NULL){p2->next=NULL;p4->next=NULL;}return s_list;}if(n==2){char name[20];struct student * p1;struct student * p2;struct gradeinform * p3;struct gradeinform * p4;p1=p2=s_list;p3=p4=g_list;printf("请输入学生姓名：");fflush(stdin);gets(name);for(;p1!=NULL&&p3!=NULL;){if(strcmp(p1->name,name)==0)break;p2=p1;p1=p1->next;p4=p3;p3=p3->next;}if(p1==NULL){printf("抱歉，查无此人！");return s_list;}if(p1==p2){s_list=p2->next;g_list=p4->next;}if(p1!=p2&&p1->next!=NULL){p2->next=p1->next;p4->next=p3->next;}if(p1!=p2&&p1->next==NULL){p2->next=NULL;p4->next=NULL;}// free(p1);// free(p2);// free(p3);// free(p4);return s_list;}if(n!=1&&n!=2){menu(s_list,g_list);}}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"void output(struct student * s_list,struct gradeinform * g_list) //显示学生信息{struct student * p1=s_list;struct gradeinform * p2=g_list;while(p1!=NULL){printf("%2d ",p1->num);printf("%4s ",p1->name);printf("%2s ",p1->sex);printf("%4d ",p1->dornum);printf("%4s ",p1->phone);printf("\n");p1=p1->next;}printf("\n");while(p2!=NULL){printf("%2d ",p2->num);printf("%4s ",p2->classnum);printf("%6s ",p2->classname);printf("%2d ",p2->credit);printf("%2d ",p2->Ugrade);printf("%2d ",p2->Egrade);printf("%2d ",p2->Jgrade);printf("%2f ",p2->Sgrade);printf("%2f ",p2->Rgrade);printf("\n");p2=p2->next;}menu(s_list,g_list);}void outputone(struct student * s_list,struct gradeinform * g_list) //显示单个学生信息{struct student * p1=s_list;struct gradeinform * p2=g_list;printf("%2d ",p1->num);printf("%4s ",p1->name);printf("%2s ",p1->sex);printf("%4d ",p1->dornum);printf("%4s ",p1->phone);printf("\n\n");printf("%2d ",p2->num);printf("%4s ",p2->classnum);printf("%6s ",p2->classname);printf("%2d ",p2->credit);printf("%2d ",p2->Ugrade);printf("%2d ",p2->Egrade);printf("%2d ",p2->Jgrade);printf("%2f ",p2->Sgrade);printf("%2f ",p2->Rgrade);printf("\n");menu(s_list,g_list);}void output1(struct student * s_list){struct student * p1=s_list;printf("%2d ",p1->num);printf("%4s ",p1->name);printf("%2s ",p1->sex);printf("%4d ",p1->dornum);printf("%4s ",p1->phone);printf("\n");}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * Ainput(struct student * s_list) //输入学生基本信息{struct student * p1=NULL;p1=Acreat();printf("请输入新学生基本信息:\n");printf("学号:");fflush(stdin);scanf("%d",&p1->num);printf("姓名:");fflush(stdin);gets(p1->name);printf("性别:");fflush(stdin);gets(p1->sex);printf("宿舍号码：");fflush(stdin);scanf("%d",&p1->dornum);printf("电话号码：");fflush(stdin);gets(p1->phone);s_list=Ainsert(p1,s_list);return s_list;}struct gradeinform * Binput(struct gradeinform * g_list) //输入学生成绩信息{struct gradeinform * p1=NULL;p1=Bcreat();printf("请输入新学生成绩信息:\n");printf("学号:");fflush(stdin);scanf("%d",&p1->num);printf("课程编号:");fflush(stdin);gets(p1->classnum);printf("课程名称:");fflush(stdin);gets(p1->classname);printf("学分：");fflush(stdin);scanf("%d",&p1->credit);printf("平时成绩：");fflush(stdin);scanf("%d",&p1->Ugrade);printf("实验成绩：");fflush(stdin);scanf("%d",&p1->Egrade);printf("卷面成绩：");fflush(stdin);scanf("%d",&p1->Jgrade);if(p1->Egrade==-1)p1->Sgrade=(float)(p1->Ugrade*0.3+p1->Jgrade*0.7);elsep1->Sgrade=(float)(p1->Ugrade*0.15+p1->Egrade*0.15+p1->Jgrade*0.7);if(p1->Sgrade >= 90 && p1->Sgrade<=100){p1->Rgrade=(float)(p1->credit*1);}if(p1->Sgrade >= 80 && p1->Sgrade<90){p1->Rgrade=(float)(p1->credit*0.8);}if(p1->Sgrade >= 70 && p1->Sgrade<80){p1->Rgrade=(float)(p1->credit*0.75);}if(p1->Sgrade >= 60 && p1->Sgrade<70){p1->Rgrade=(float)(p1->credit*0.6);}if(p1->Sgrade < 60){p1->Rgrade=(float)(p1->credit*0);}g_list=Binsert(p1,g_list);return g_list;}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * Ainput(struct student * s_list) //输入学生基本信息{struct student * p1=NULL;p1=Acreat();printf("请输入新学生基本信息:\n");printf("学号:");fflush(stdin);scanf("%d",&p1->num);printf("姓名:");fflush(stdin);gets(p1->name);printf("性别:");fflush(stdin);gets(p1->sex);printf("宿舍号码：");fflush(stdin);scanf("%d",&p1->dornum);printf("电话号码：");fflush(stdin);gets(p1->phone);s_list=Ainsert(p1,s_list);return s_list;}struct gradeinform * Binput(struct gradeinform * g_list) //输入学生成绩信息{struct gradeinform * p1=NULL;p1=Bcreat();printf("请输入新学生成绩信息:\n");printf("学号:");fflush(stdin);scanf("%d",&p1->num);printf("课程编号:");fflush(stdin);gets(p1->classnum);printf("课程名称:");fflush(stdin);gets(p1->classname);printf("学分：");fflush(stdin);scanf("%d",&p1->credit);printf("平时成绩：");fflush(stdin);scanf("%d",&p1->Ugrade);printf("实验成绩：");fflush(stdin);scanf("%d",&p1->Egrade);printf("卷面成绩：");fflush(stdin);scanf("%d",&p1->Jgrade);if(p1->Egrade==-1)p1->Sgrade=(float)(p1->Ugrade*0.3+p1->Jgrade*0.7);elsep1->Sgrade=(float)(p1->Ugrade*0.15+p1->Egrade*0.15+p1->Jgrade*0.7);if(p1->Sgrade >= 90 && p1->Sgrade<=100){p1->Rgrade=(float)(p1->credit*1);}if(p1->Sgrade >= 80 && p1->Sgrade<90){p1->Rgrade=(float)(p1->credit*0.8);}if(p1->Sgrade >= 70 && p1->Sgrade<80){p1->Rgrade=(float)(p1->credit*0.75);}if(p1->Sgrade >= 60 && p1->Sgrade<70){p1->Rgrade=(float)(p1->credit*0.6);}if(p1->Sgrade < 60){p1->Rgrade=(float)(p1->credit*0);}g_list=Binsert(p1,g_list);return g_list;}#include<stdio.h>#include <malloc.h>#include <string.h>#include <stdlib.h>#include "student.h"struct student * Aread() //读取学生基本信息{FILE * fp=NULL;struct student *p=NULL;struct student *s_list=NULL;if((fp=fopen("A.txt","r+"))==NULL){return NULL;}while(!feof(fp)){if((p=(struct student *)malloc(sizeof(struct student)))==NULL){printf("内存不足，请释放内存之后重试！");return NULL;}memset(p,0,sizeof(struct student));if(fread(p,sizeof(struct student),1,fp)){p->next=NULL;s_list=Ainsert(p,s_list);}}fclose(fp);return s_list;}struct gradeinform * Bread() //读取学生成绩信息{FILE * fp=NULL;struct gradeinform *p=NULL;struct gradeinform *g_list=NULL;if((fp=fopen("B.txt","r+"))==NULL){return NULL;}while(!feof(fp)){if((p=(struct gradeinform *)malloc(sizeof(struct gradeinform)))==NULL){printf("内存不足，请释放内存之后重试！");return NULL;}memset(p,0,sizeof(struct gradeinform));if(fread(p,sizeof(struct gradeinform),1,fp)){p->next=NULL;g_list=Binsert(p,g_list);}}fclose(fp);return g_list;}。