福建工程学院计算机与信息科学系实验报告代码：#include <stdio.h>#include <stdlib.h>#include <ctype.h>#include<conio.h>#define Null 0struct student{int num;char name[20];float chinese,math,english,ave,sum;struct student *next;};void print (){printf(" |------------------------------------------------|\n");printf(" | 欢迎光临学生成绩管理系统|\n");printf(" |------------------------------------------------|\n");printf(" | 1 ==> 创建学生数据|\n");printf(" | 2 ==> 载入学生数据|\n");printf(" | 3 ==> 添加学生数据|\n");printf(" | 4 ==> 查询学生数据|\n");printf(" | 5 ==> 删除学生数据|\n");printf(" | 6 ==> 统计班级人数|\n");printf(" | 7 ==> 排序|\n");printf(" | 0 ==> 退出学生管理系统|\n");printf(" |------------------------------------------------|\n");}struct student *init (int n){int i;struct student *head,*p,*s;for (i=1;i<=n;i++){if (i==1){printf("请输入第%d个学生信息:\n",i);p=(struct student *)malloc (sizeof(struct student));printf("学号\n");scanf("%d",&p->num);printf("姓名\n");scanf("%s",&p->name);printf("语文\n");scanf("%f",&p->chinese);printf("数学\n");scanf("%f",&p->math);printf("英语\n");scanf("%f",&p->english);p->sum=p->chinese+p->math+p->english;p->ave=p->sum/3;head=p;if (n==1) p->next=Null;}else{printf("请输入第%d个学生信息:\n",i);s=(struct student *)malloc (sizeof(struct student));printf("学号\n");scanf("%d",&s->num);printf("姓名\n");scanf("%s",&s->name);printf("语文\n");scanf("%f",&s->chinese);printf("数学\n");scanf("%f",&s->math);printf("英语\n");scanf("%f",&s->english);s->sum=s->chinese+s->math+s->english;s->ave=s->sum/3;p->next=s;p=s;s->next=Null;}}return head;}void insert (struct student *head){struct student *p,*pi;int xuehao;printf ("请问要在哪个学生后面插入数据（输入学号）:");scanf("%d",&xuehao);pi=(struct student *)malloc (sizeof(struct student));p=head;printf("学号\n");scanf("%d",&pi->num);printf("姓名\n");scanf("%s",&pi->name);printf("语文\n");scanf("%f",&pi->chinese);printf("数学\n");scanf("%f",&pi->math);printf("英语\n");scanf("%f",&pi->english);pi->sum=pi->chinese+pi->math+pi->english;pi->ave=pi->sum/3;if (head==Null){head=pi;pi->next=Null;}else{while ((p->num!=xuehao)&&(p->next!=Null)){p=p->next;}if (p->next!=Null){pi->next=p->next;p->next=pi;}else{p->next=pi;pi->next=Null;}}}void search (struct student *head){int no;struct student *p;p=head;int n=0;printf("1 按学号查找\n");printf("2 按分数段查找\n");scanf("%d",&n);switch(n){case 1:printf("请输入要查找同学的学号:");scanf("%d",&no);while(p!=Null){if(p->num==no){printf("------------------学生成绩表-----------------------\n");printf("===================================================\n");printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");printf("===================================================\n"); printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);printf("===================================================\n");break;}p=p->next;}break;case 2:{float a,b;int choose;char c;for(;;){printf("\t|---------------------------------------|\n");printf("\t| 分数段查询|\n");printf("\t|---------------------------------------|\n");printf("\t| 1 ==> 按总分成绩查询|\n");printf("\t| 2 ==> 按语文成绩查询|\n");printf("\t| 3 ==> 按数学成绩查询|\n");printf("\t| 4 ==> 按英语成绩查询|\n");printf("\t| 0 ==> 返回上一级菜单|\n");printf("\t|---------------------------------------|\n");printf("请输入你要执行的操作:");scanf("%d",&choose);while(getchar()!='\n');switch(choose){case 1:{p=head;printf("请输入所要查找的分数段:\n");printf("请输入第一个分数:\n");scanf("%f",&a);printf("请输入第二个分数:\n");scanf("%f",&b);printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");while(p!=Null){if (p->sum>=a&&p->sum<=b){printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);}p=p->next;}}break;case 2:{p=head;printf("请输入所要查找的分数段:\n");printf("请输入第一个分数:\n");scanf("%f",&a);printf("请输入第二个分数:\n");scanf("%f",&b);printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");while(p!=Null){if (p->chinese>=a&&p->chinese<=b){printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);}p=p->next;}}break;case 3:{p=head;printf("请输入所要查找的分数段:\n");printf("请输入第一个分数:\n");scanf("%f",&a);printf("请输入第二个分数:\n");scanf("%f",&b);printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");while(p!=Null){if (p->math>=a&&p->math<=b){printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);}p=p->next;}}break;case 4:{p=head;printf("请输入所要查找的分数段:\n");printf("请输入第一个分数:\n");scanf("%f",&a);printf("请输入第二个分数:\n");scanf("%f",&b);printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");while(p!=Null){if (p->english>=a&&p->english<=b){printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);}p=p->next;}}break;case 0: return ;default: printf("\n\n您的输入有误!请重新输入：\n\n");break;}}}}}struct student *del (struct student *head,int n){struct student *p,*q;p=head;if (head==Null){printf("没有学生的资料要删除!\n");return head;}while (p->num!=n&&p->next!=Null){q=p;p=p->next;}if (p->num==n){if (p==head)head=p->next;elseq->next=p->next;free (p);}elseprintf("找不到相应的学生资料!\n");return head;}void list(struct student *head){int i=0;struct student *p;p=head;printf("------------------学生成绩表-----------------------\n");printf("===================================================\n");printf("%-5s%-8s%-8s%-8s%-8s%-8s%-8s\n","学号","姓名","语文","数学","英语","总分","平均分");printf("===================================================\n");while (p!=Null){printf("%-5d%-8s%-8.1f%-8.1f%-8.1f%-8.1f%-8.1f\n",p->num,p->name,p->chinese,p->ma th,p->english,p->sum,p->ave);p=p->next;}printf("===================================================\n");printf("\n\n");}void tongji (struct student *head){int i=0;struct student *p;float chinese1=0,math1=0,english1=0;p=head;while(p!=Null){i=i+1;chinese1=chinese1+p->chinese;math1=math1+p->math;english1=english1+p->english;p=p->next;}printf("班级总人数为：%d\n",i);printf("班级语文平均分为：%4.1f\n",chinese1/i);printf("班级数学平均分为：%4.1f\n",math1/i);printf("班级英语平均分为：%4.1f\n",english1/i);printf("\n");}student *sort(student *head,int choose){student *p1,*p2=head,*pm,*px;student mid;if (!p2) return head;for(p1=p2;p1->next!=NULL;p1=p1->next){pm=p1;for(p2=p1->next;p2!=NULL;p2=p2->next)switch(choose){case 1:if (pm->num>p2->num) pm=p2;break;case 2:if (pm->sum<p2->sum) pm=p2;break;case 3:if (pm->chinese<p2->chinese) pm=p2;break;case 4:if (pm->math<p2->math) pm=p2;break;case 5:if (pm->english<p2->english) pm=p2;break;}if (pm!=p1){mid=*pm;*pm=*p1;*p1=mid;px=pm->next;pm->next=p1->next;p1->next=px;}}printf("\n排序后的成绩表为:\n");list(head);return head;}student *sort_all(student *head){int choose;for(;;){printf("\t|---------------------------------------|\n");printf("\t| 学生成绩统计排序|\n");printf("\t|---------------------------------------|\n");printf("\t| 1 ==> 按学生学号排序|\n");printf("\t| 2 ==> 按学生总分排序|\n");printf("\t| 3 ==> 按学生语文成绩排序|\n");printf("\t| 4 ==> 按学生数学成绩排序|\n");printf("\t| 5 ==> 按学生英语成绩排序|\n");printf("\t| 0 ==> 返回上一级菜单|\n");printf("\t|---------------------------------------|\n");printf("请输入你要执行的操作:");scanf("%d",&choose);while(getchar()!='\n');switch(choose){case 1:head=sort(head,choose);break;case 2:head=sort(head,choose);break;case 3:head=sort(head,choose);break;case 4:head=sort(head,choose);break;case 5:head=sort(head,choose);break;case 0:return head;default: printf("\n\n您的输入有误!请重新输入：\n\n");break;}}}void save(struct student *head){int i,j;FILE *fp;student *p;p=head;char c; //head 头指针if((fp=fopen("c:\\stu_list","wb"))==NULL){printf("Cannot open file strike any key exit!");getch();exit(0);}while(p){fwrite(p,sizeof(student),1,fp);p=p->next;}fclose(fp);}struct student* read(){int i=0,j;FILE *fp;struct student *p; //工作指针student *last,*head; //最后一项的指针head=(student*)malloc(sizeof(student));last=head;if((fp=fopen("c:\\stu_list","rb"))==NULL){printf("Cannot open file strike any key exit!");getch();exit(0);}while(!feof(fp)){p=(student*)malloc(sizeof(student));if(fread(p,sizeof(student),1,fp)==1){last->next=p;last=last->next;}}fclose(fp);return head=head->next;}int main(){FILE *fp;char ch,c;int n=0;struct student *head,*r;print();while((ch=tolower(getchar()))!='0'){switch(ch){case '1':{printf("请问有多少个学生的资料要输入?\n");scanf("%d",&n);head=init(n);list(head);save(head);break;}case '2':{head=read();list(head);break;}case '3':{insert(head);list (head);save(head);break;}case '4':{search(head);break;}case '5':{int num;printf("请输入要删除学生的学号:\n");scanf("%d",&num);head=del(head,num);list (head);save(head);break;}case '6':{tongji(head);break;}case '7':{head=read();sort_all(head);break;}default:break;}printf("\n\n\t======>按Enter键返回主菜单\n");fflush(stdin);c=getchar();system("cls");print();}}。
