我去年做的
#include<time.h>
#include<stdio.h>
#include<conio.h>
#include <stdlib.h>
#define MAX 50
void input()
void sort()
void display()
void insert()
void del()
void average()
int now_no=0
struct student
{
int no
char name[20]
char sex[4]
float score1
float score2
float score3
float sort
float ave
float sum
}
struct student stu[MAX],*p
main()//主函数
{
char as
start: printf("ttt欢迎使用学生成绩管理系统nn")
//一下为功能选择模块
do{
printf("ntttt1.录入学员信息ntttt2.显示学员信息ntttt3.成绩排序信息ntttt4.添加学员信息ntttt5.删除学员信息ntttt6.退出n")
printf("tttt选择功能选项:")
as=getch()
switch(as)
{
case '1':
system("cls")
input()
break
case '2':
system("cls")
display()
break
case '3':
system("cls")
sort()
break
case '4':
system("cls")
insert()
break
case '5':
system("cls")
del()
break
case '6':
system("exit")
exit(0)
default:
system("cls")
goto start
}
}while(1)
//至此功能选择结束
}
void input()//原始数据录入模块
{
int i=0
char ch
do
{
printf("tttt1.录入学员信息n输入第%d个学员的信息n",i+1)
printf("n输入学生编号:")
scanf("%d",&stu[i].no)
fflush(stdin)
printf("n输入学员姓名:")
fflush(stdin)
gets(stu[i].name)
printf("n输入学员性别:")
fflush(stdin)
gets(stu[i].sex)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[i].score1)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[i].score2)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[i].score3)
printf("nn")
i++
now_no=i
printf("%d",now_no)
printf("是否继续输入?(Y/N)")
ch=getch()
system("cls")
}
while(ch!='n')
system("cls")
}
void sort()//排序数据函数
{
struct student temp
int i,j
for(i=1i<now_noi++)
{
for(j=1j<=now_no-ij++)
{
if(stu[j-1].ave<stu[j].ave)
{temp=stu[j]
stu[j]=stu[j-1]
stu[j-1]=temp
}}}
}
void display()//显示数据函数
{
int i
char as
float ave
do
{
printf("tt班级学员信息列表n")
printf("t编号t姓名t性别t成绩t成绩t成绩t平均值n")
for(i=0i<now_noi++)
{
stu[i].sum=stu[i].score1+stu[i].score2+stu[i].score3
stu[i].ave=stu[i].sum/3
printf("t%dt%st%st%.2ft%.2ft%.2ft%.2fn",stu[i].no,stu[i].name,stu[i].sex,stu[i].score1,stu[i].score2,stu[i].score3,stu[i].ave)
}
printf("tt按任意键返回主菜单.")
as=getch()
goto exit
}
while(as!='n')
exit: system("cls")
}
void insert()//插入数据函数
{
char ch
do
{
printf("ntt输入新插入学员队信息n")
printf("n输入学生编号:")
scanf("%d",&stu[now_no].no)
fflush(stdin)
printf("n输入学员姓名:")
fflush(stdin)
gets(stu[now_no].name)
printf("n输入学员性别:")
fflush(stdin)
gets(stu[now_no].sex)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[now_no].score1)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[now_no].score2)
printf("n输入学员成绩:")
fflush(stdin)
scanf("%f",&stu[now_no].score3)
printf("nn")
now_no=now_no+1
sort()
printf("是否继续输入?(Y/N)")
ch=getch()
system("cls")
}
while(ch!='n')
}
void del()//删除数据函数
{
int inum,i,j
printf("输入要删除学员的编号:")
fflush(stdin)
scanf("%d",&inum)
for(i=0i<now_noi++)
{
if(stu[i].no==inum)
{
for(j=ij<now_noj++)
{
stu[i]=stu[i+1]
}
now_no=now_no-1
}
break
}
system("cls")
}
#include <stdio.h>
#include <string.h>
#include <windows.h>
struct student
{
long int num
char name[20]
int age
char sex[4]
char b[30]
char p[15]
}
int n=0
struct student stu[100]
struct student *p
void lr()
void ll()
void cx()
void xg()
void sc()
void main()
{
int z
printf("+---------------------------+n")
printf("| 欢迎使用学生信息管理系统 |n")
printf("+---------------------------+n")
printf("提示：为保证您的操作得到保存，请按正常顺序退出系统^_^n")
do
{
printf("nttt--------------------------------n")
printf("ttt+主菜单|n")
printf("ttt--------------------------------n")
printf("ttt+[1]----录入学生信息 |n")
printf("ttt+[2]----浏览学生信息 |n")
printf("ttt+[3]----查询学生信息 |n")
printf("ttt+[4]----删除学生信息 |n")
printf("ttt+[5]----修改学生信息 |n")
printf("ttt+[0]----退出系统 |n")
printf("ttt--------------------------------n")
printf("请输入您的选择：")
scanf("%d", &z)
system("color 2f")
switch(z)
{
case 0 :break
case 1 :lr()break
case 2 :ll()break
case 3 :cx()break
case 4 :sc()break
case 5 :xg()break
default:printf("n无效选项!")
}
}
while(z!= 0)
}
void lr()
{
int y
if(n==0)
p=stu
do
{
printf("--------------------n")
printf("请输入学生的学号:")
scanf("%ld",&p->num)
printf("请输入学生的姓名:")
scanf("%s",p->name)
printf("请输入学生的年龄:")
scanf("%d",&p->age)
printf("请输入学生的性别:")
scanf("%s",p->sex)
printf("请输入学生的地址:")
scanf("%s",p->b)
printf("请输入学生的电话:")
scanf("%s",p->p)
n++
p++
printf("n1.继续输入.n0.输入完毕.n")
printf("请选择：")
scanf("%d",&y)
}
while(y==1)
printf("提示：输入完毕!你一共输入%d个n",n)
}
void ll()
{
int i,j
if(n!=0)
{ printf("学生总数:%dn", n)
printf("学号t姓名t年龄t性别t地址tt电话n")
printf("-----------------------------------------------------n")
for(i=0i<ni++)
printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)
}
else printf("提示:无学生数据，请输入数据！")
}
void cx()
{
int c
int w,i,j=0
char name[20]
if(n!=0)
{
do{printf("n")
printf("+--------------------+n")
printf("| 按学号查询 请按 1 |n")
printf("| 按姓名查询 请按 2 |n")
printf("| 取消请按 0 |n")
printf("+--------------------+n")
printf("请输入您的选择：")
scanf("%d", &c)
switch(c)
{
case 0:break
case 1:
printf("请输入学生的学号")
scanf("%ld", &w)
printf("n")
for(i=0i<ni++)
if(stu[i].num==w)
{
printf("n学号t姓名t年龄t性别t地址tt电话n")
printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)
j=1
}
if(j==0)
printf("提示:没有该学生记录，请核对！")
break
case 2:
printf("请输入学生的姓名：")
scanf("%s", name)
printf("n")
for(i=0i<ni++)
if(strcmp(name,stu[i].name)==0)
{
printf("n学号t姓名t年龄t性别t地址tt电话n")
j=1
printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)
}
if(j==0)
printf("提示:没有该学生记录，请核对！")
break
default:
printf("n提示:无效选项!")
break
}
}while(c!= 0)
}else printf("提示:无学生数据，请输入数据！")
return
}
void xg()
{
long int num
int i,j,c
if(n!=0)
{
printf("请输入您要修改的学生的学号：")
scanf("%ld", &num)
printf("n")
for(i=0i<ni++)
if(stu[i].num==num)
j=i
do{
printf("请选择您要修改的学生的信息内容：n")
printf("+----------------------+n")
printf("| 姓名 请按 1 |n")
printf("| 年龄 请按 2 |n")
printf("| 性别 请按 3 |n")
printf("| 学号 请按 4 |n")
printf("| 地址 请按 5 |n")
printf("| 电话 请按 6 |n")
printf("| 取消 请按 0 |n")
printf("+----------------------+n")
printf("请输入您的选择：")
scanf("%d", &c)
printf("n")
switch(c)
{
case 0:break
case 1:printf("请输入新姓名：")
scanf("%s",stu[j].name)
break
case 2:printf("请输入新年龄：")
scanf("%d",&stu[j].age)
break
case 3:printf("请输入新性别：")
scanf("%s",stu[j].sex)
break
case 4:printf("请输入新学号：")
scanf("%ld",&stu[j].num)
break
case 5:printf("请输入新地址：")
scanf("%s",stu[j].b)
break
case 6:printf("请输入新电话：")
scanf("%s",stu[j].p)
break
default:
printf("n无效选项!")
break
}
}while(c!= 0)
}else printf("提示:无学生数据，请输入数据！")
}
void sc()
{
long int num
int i,j,e
if(n!=0)
{
printf("学号t姓名t年龄t性别t地址tt电话n")
printf("-----------------------------------------------------n")
for(i=0i<ni++)
printf("%ldt%st%dt%st%stt%sn",stu[i].num,stu[i].name,stu[i].age,stu[i].sex,stu[i].b,stu[i].p)
printf("请输入您要删除的学生的学号：")
scanf("%ld", &num)
printf("n")
for(i=0i<ni++)
if(num==stu[i].num)
j=i
if(j!=(n-1))
{
for(e=i-1e<ne++,j++)
{
stu[j].num=stu[j+1].num
strcpy(stu[j].name,stu[j+1].name)
strcpy(stu[j].sex,stu[j+1].sex)
stu[j].age=stu[j+1].age
strcpy(stu[j].b,stu[j+1].b)
strcpy(stu[j].p,stu[j+1].p)
n--p--
}
}else {n--p--}
printf("提示:删除完毕！")
}elseprintf("提示:无学生数据，请输入数据！")
}
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>
#define max 20
typedef struct student//学生
{
char sno[max]// 学号
char sname[max] //姓名
char sex[max] //性别
char age[max] //年龄
char depart[max] //系
char classs[max] //班
char grade[max]//年级
struct student* next
} student
student* head
int LogOn() //登录模块，已实现输入密码不回显，如果中途发现输错某几位，可退格键重输
{
char username[max],password[max]
printf("n请输入用户名:")
scanf("%s",username)
printf("n请输入密码(最多15位):")
//开始以不回显且支持退格方式获取输入密码
int i=0
while((i>=0)&&(password[i++]=getch())!=13)//条件i>=0是用于限制退格的范围
{
if(password[i-1]=='b')//对退格键的处理
{
printf("%c%c%c",'b','0','b')
i=i-2
}
else
printf("*")
}
password[--i]='0'
//已获取密码。验证用户身份
if(!strcmp(username,"zhang")&&!strcmp(password,"8147086"))
{
printf("n登录成功!")
return 1
}
else
return 0
}
void regist()
{
char ch
student *s,*ptr //s用来建新结点，ptr用来暂存头结点
do
{
s=(student*)malloc(sizeof(student))// 新建一个学生结点
printf("n开始注册...") //开始注册
printf("n请输入该学生的学号:")
scanf("%s",s->sno)
printf("n请输入该学生的姓名:")
scanf("%s",s->sname)
printf("n请输入该学生的性别:")
scanf("%s",s->sex)
printf("n请输入该学生的年龄:")
scanf("%s",s->age)
printf("n请输入该学生的系:")
scanf("%s",s->depart)
printf("n请输入该学生所在的班:")
scanf("%s",s->classs)
printf("n请输入该学生所在的年级")
scanf("%s",s->grade)
ptr=head
head=s//将新结点插入队头
s->next=ptr
fflush(stdin)
printf("n请问是否继续注册?(Y/N)")
scanf("%c",&ch)
}while(ch=='Y'||ch=='y')
return
}
void ElePrint(char str[]) //输出单个元素
{
if(str==NULL) exit(0)
printf("%s",str)
for(unsigned int i=0i<12-strlen(str)i++) printf(" ")//为了对齐输出，需插入一些空格
return
}
int LinePrint(student *ptr) //输出一行
{
if(ptr==NULL) //检查传进来的指针
return 0
printf("n")
ElePrint(ptr->sno)
ElePrint(ptr->sname)
ElePrint(ptr->age)
ElePrint(ptr->sex)
ElePrint(ptr->depart)
ElePrint(ptr->classs)
ElePrint(ptr->grade)
return 1
}
void print() //输出全部学生信息
{
student *ptr=head
printf("n学号姓名年龄性别系 班 年级")
while(ptr)
{
LinePrint(ptr)
ptr=ptr->next
}
printf("n")
return
}
void search()//查询模块
{
int method//查询方式
char no[max],name[max],departm[max],clss[max],grades[max]//用来接收查询关键字
while(1)
{
printf("n请选择查询方式")
printf("n1.按学号查询")
printf("n2.按姓名查询")
printf("n3.按所在系查询")
printf("n4.按所在班级查询")
printf("n5.按所在年级查询")
printf("n6.打印全部学生信息")
printf("n7.返回主菜单n")
scanf("%d",&method)
student *p=head,*temp
switch(method)
{
case 1:
printf("n请输入要查询的学号:")
scanf("%s",no)
while(p)
{
if(!strcmp(p->sno,no))
break
else
{
temp=p
p=p->next
}
}
printf("n学号姓名年龄性别系 班 年级")
LinePrint(p)
break
case 2:
printf("n请输入要查询的姓名:")
scanf("%s",name)
printf("n学号姓名年龄性别系 班 年级")
while(p)
{
if(!strcmp(p->sname,name))
LinePrint(p)
p=p->next
}
break
case 3:
printf("n请输入学生所在的系:")
scanf("%s",departm)
printf("n学号姓名年龄性别系 班 年级")
while(p)
{
if(!strcmp(p->depart,departm))
LinePrint(p)
p=p->next
}
break
case 4:
printf("n请输入学生所在的班:")
scanf("%s",clss)
printf("n请输入学生所在的年级:")
scanf("%s",grades)
printf("n学号姓名年龄性别系 班 年级")
while(p)
{
if(!strcmp(p->classs,clss)&&!strcmp(p->grade,grades))
LinePrint(p)
p=p->next
}
break
case 5:
printf("n请输入学生所在的年级:")
scanf("%s",grades)
printf("n学号姓名年龄性别系 班 年级")
while(p)
{
if(!strcmp(p->grade,grades))
LinePrint(p)
p=p->next
}
break
case 6:
print()
break
case 7:
return
default:
printf("很抱歉，暂无此查询方式!")
break
}
}
}
void modify()//修改学生信息
{
char num[max]
student *p=head
printf("n请输入要修改的学生的学号:")
scanf("%s",num)
while(p)
{
if(!strcmp(p->sno,num))
break
else
p=p->next
}
if(p==NULL)
{
printf("n错误：没有此学生的信息!n")
return
}
LinePrint(p)
printf("n请输入要修改的该学生的信息:")
printf("n1.姓名")
printf("n2.性别")
printf("n3.年龄")
printf("n4.所在的系")
printf("n5.所在的班")
printf("n6.所在的年级")
char name1[max],sex1[max],age1[max],depart1[max],class1[max],grade1[max]
int select
fflush(stdin)
scanf("%d",&select)
printf("n请输入新的信息:")
switch(select)
{
case 1:
scanf("%s",name1)
strcpy(p->sname,name1)
break
case 2:
scanf("%s",sex1)
strcpy(p->sex,sex1)
break
case 3:
scanf("%s",age1)
strcpy(p->age,age1)
break
case 4:
scanf("%s",depart1)
strcpy(p->depart,depart1)
break
case 5:
scanf("%s",class1)
strcpy(p->classs,class1)
break
case 6:
scanf("%s",grade1)
strcpy(p->grade,grade1)
break
default:
printf("nError!")
break
}
LinePrint(p)
return
}
void del()// 删除某学生的信息
{
student *p=head,*temp=head,*s
char num1[max]
printf("n请输入要删除的学生的学号:")
scanf("%s",num1)
while(p)//查找该学生所在的结点
{
if(!strcmp(p->sno,num1))
break
else
{
temp=p
p=p->next
}
}//while
if(!p)
{
printf("n不存在此学生的信息.")
return
}
LinePrint(p)//输出该学生的信息
printf("n请问真的要删除该学生的信息吗?(Y/N)")
char ch
fflush(stdin)
scanf("%c",&ch)
if(ch=='Y'||ch=='y')
{
s=p->next
temp->next=s
free(p)
printf("n已经删除该学生的信息.")
}
return
}
void sort() //排序模块。将学生记录按学号从小到大排列。用起泡排序算法实现
{
student *ptr,*s=head,*p
int count=0,count1
while(s)//统计链表结点个数
{
count++
s=s->next
}
for(int i=1i<counti++)
{
ptr=head
p=NULL
count1=count-i//用来控制每轮起泡排序的终点，即每次把学号最小的结点移到倒数第i个结点
while(ptr&&ptr->next&&(count1--))
{
if(strcmp(ptr->sno,ptr->next->sno)>0)
{
s=ptr->next
ptr->next=s->next
if(p==NULL) //ptr处于队头时
head=s
else
p->next=s
s->next=ptr
p=s
}
else
{
ptr=ptr->next
if(p==NULL) //ptr处于队头时
p=head
else
p=p->next
}
}
}
return
}
void quit()
{
char ch
printf("n真的要退出？(Y/N)")
fflush(stdin)
scanf("%c",&ch)
if(ch=='Y'||ch=='y')
exit(0)
return
}
int main()
{
int option
printf("nCopyright@2005 KongXinCai All rights reserved.")
printf("n欢迎使用学生信息管理系统!n")
//登录模块
int icheck=0
while(icheck<3)
{
if(LogOn()==0)
icheck++
else
break
}
if(icheck==3)
{
printf("n连续登录三次不成功，退出!")
exit(0)
}
//系统界面
while(1)
{
printf("nn请选择需要的服务:")
printf("n1.注册")
printf("n2.查询")
printf("n3.修改")
printf("n4.删除")
printf("n5.排序")
printf("n7.求平均")
printf("n6.退出n")
scanf("%d",&option)
switch(option)
{
case 1:
regist()
break
case 2:
search()
break
case 3:
modify()
break
case 4:
del()
break
case 5:
sort()
break
case 6:
quit()
break
}
}
return 0
}
1、 输入一个班级的学生基本信息（包括学号，姓名，性别，5门课程成绩
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<dos.h>
#include<string.h>
#define LEN sizeof(struct student)
#define FORMAT "%-8d%-15s%-12.1lf%-12.1lf%-12.1lf%-12.1lfn"
#define DATA stu[i].num,stu[i].name,stu[i].elec,stu[i].expe,stu[i].requ,stu[i].sum
struct student
{ int num
char name[15]
double elec
double expe
double requ
double sum
}
struct student stu[50]
void in()
void show()
void order()
void del()
void modify()
void menu()
void insert()
void total()
void search()
void main()
{ int n
menu()
scanf("%d",&n)
while(n)
{ switch(n)
{ case 1: in()break
case 2: search()break
case 3: del()break
case 4: modify()break
case 5: insert()break
case 6: order()break
case 7: total()break
case 8: show()break
default:break
}
getch()
menu()
scanf("%d",&n)
}
}
void in()
{ int i,m=0
char ch[2]
FILE *fp
if((fp=fopen("data.txt","a+"))==NULL)
{
printf("can not openn")
return
}
while(!feof(fp))
{
if(fread(&stu[m] ,LEN,1,fp)==1)
m++
}
fclose(fp)
if(m==0)
printf("No record!n")
else
{
system("cls")
show()
}
if((fp=fopen("data.txt","wb"))==NULL)
{
printf("can not openn")
return
}
for(i=0i<mi++)
fwrite(&stu[i] ,LEN,1,fp)
printf("please input(y/n):")
scanf("%s",ch)
while(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)
{
printf("number:")
scanf("%d",&stu[m].num)
for(i=0i<mi++)
if(stu[i].num==stu[m].num)
{
printf("the number is existing,press any to continue!")
getch()
fclose(fp)
return
}
printf("name:")
scanf("%s",stu[m].name)
printf("elective:")
scanf("%lf",&stu[m].elec)
printf("experiment:")
scanf("%lf",&stu[m].expe)
printf("required course:")
scanf("%lf",&stu[m].requ)
stu[m].sum=stu[m].elec+stu[m].expe+stu[m].requ
if(fwrite(&stu[m],LEN,1,fp)!=1)
{
printf("can not save!")
getch()
}
else
{
printf("%s saved!n",stu[m].name)
m++
}
printf("continue?(y/n):")
scanf("%s",ch)
}
fclose(fp)
printf("OK!n")
}
void show()
{ FILE *fp
int i,m=0
fp=fopen("data.txt","rb")
while(!feof(fp))
{
if(fread(&stu[m] ,LEN,1,fp)==1)
m++
}
fclose(fp)
printf("number name elective experiment required sumtn")
for(i=0i<mi++)
{
printf(FORMAT,DATA)
}
}
void menu()
{
system("cls")
printf("nnnnn")
printf("tt|---------------------STUDENT-------------------|n")
printf("tt|t 0. exit |n")
printf("tt|t 1. input record |n")
printf("tt|t 2. search record |n")
printf("tt|t 3. delete record |n")
printf("tt|t 4. modify record |n")
printf("tt|t 5. insert record |n")
printf("tt|t 6. order |n")
printf("tt|t 7. number |n")
printf("tt|t 8. show |n")
printf("tt|-----------------------------------------------|nn")
printf("tttchoose(0-8):")
}
void order()
{ FILE *fp
struct student t
int i=0,j=0,m=0
if((fp=fopen("data.txt","r+"))==NULL)
{
printf("can not open!n")
return
}
while(!feof(fp))
if(fread(&stu[m] ,LEN,1,fp)==1)
m++
fclose(fp)
if(m==0)
{
printf("no record!n")
return
}
if((fp=fopen("data.txt","wb"))==NULL)
{
printf("can not openn")
return}
for(i=0i<m-1i++)
for(j=i+1j<mj++)
if(stu[i].sum<stu[j].sum)
{ t=stu[i]stu[i]=stu[j]stu[j]=t}
if((fp=fopen("data.txt","wb"))==NULL)
{ printf("can not openn")return}
for(i=0i<mi++)
if(fwrite(&stu[i] ,LEN,1,fp)!=1)
{
printf("%s can not save!n")
getch()
}
fclose(fp)
printf("save successfullyn")
}
void del()
{FILE *fp
int snum,i,j,m=0
char ch[2]
if((fp=fopen("data.txt","r+"))==NULL)
{ printf("can not openn")return}
while(!feof(fp)) if(fread(&stu[m],LEN,1,fp)==1) m++
fclose(fp)
if(m==0)
{
printf("no record!n")
return
}
printf("please input the number:")
scanf("%d",&snum)
for(i=0i<mi++)
if(snum==stu[i].num)
break
printf("find the student,delete?(y/n)")
scanf("%s",ch)
if(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)
for(j=ij<mj++)
stu[j]=stu[j+1]
m--
if((fp=fopen("data.txt","wb"))==NULL)
{ printf("can not openn")return}
for(j=0j<mj++)
if(fwrite(&stu[j] ,LEN,1,fp)!=1)
{ printf("can not save!n")
getch()}
fclose(fp)
printf("delete successfully!n")
}
void search()
{ FILE *fp
int snum,i,m=0
char ch[2]
if((fp=fopen("data.txt","rb"))==NULL)
{ printf("can not openn")return}
while(!feof(fp)) if(fread(&stu[m],LEN,1,fp)==1) m++
fclose(fp)
if(m==0) {printf("no record!n")return}
printf("please input the number:")
scanf("%d",&snum)
for(i=0i<mi++)
if(snum==stu[i].num)
{ printf("find the student,show?(y/n)")
scanf("%s",ch)
if(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)
{
printf("number name elective experiment required sumtn")
printf(FORMAT,DATA)
break
}
}
if(i==m) printf("can not find the student!n")
}
void modify()
{ FILE *fp
int i,j,m=0,snum
if((fp=fopen("data.txt","r+"))==NULL)
{ printf("can not openn")return}
while(!feof(fp))
if(fread(&stu[m],LEN,1,fp)==1) m++
if(m==0) {printf("no record!n")
fclose(fp)
return
}
show()
printf("please input the number of the student which do you want to modify!n")
printf("modify number:")
scanf("%d",&snum)
for(i=0i<mi++)
if(snum==stu[i].num)
break
printf("find the student!you can modify!n")
printf("name:")
scanf("%s",stu[i].name)
printf("elective:")
scanf("%lf",&stu[i].elec)
printf("experiment:")
scanf("%lf",&stu[i].expe)
printf("required course:")
scanf("%lf",&stu[i].requ)
printf("modify successful!")
stu[i].sum=stu[i].elec+stu[i].expe+stu[i].requ
if((fp=fopen("data.txt","wb"))==NULL)
{ printf("can not openn")return}
for(j=0j<mj++)
if(fwrite(&stu[j] ,LEN,1,fp)!=1)
{ printf("can not save!")getch()}
fclose(fp)
}
void insert()
{ FILE *fp
int i,j,k,m=0,snum
if((fp=fopen("data.txt","r+"))==NULL)
{ printf("can not openn")return}
while(!feof(fp))
if(fread(&stu[m],LEN,1,fp)==1) m++
if(m==0) {printf("no record!n")
fclose(fp)
return
}
printf("please input position where do you want to insert!(input the number)n")
scanf("%d",&snum)
for(i=0i<mi++)
if(snum==stu[i].num)
break
for(j=m-1j>ij--)
stu[j+1]=stu[j]
printf("now please input the new information.n")
printf("number:")
scanf("%d",&stu[i+1].num)
for(k=0k<mk++)
if(stu[k].num==stu[i+1].num)
{
printf("the number is existing,press any to continue!")
getch()
fclose(fp)
return
}
printf("name:")
scanf("%s",stu[i+1].name)
printf("elective:")
scanf("%lf",&stu[i+1].elec)
printf("experiment:")
scanf("%lf",&stu[i+1].expe)
printf("required course:")
scanf("%lf",&stu[i+1].requ)
stu[i+1].sum=stu[i+1].elec+stu[i+1].expe+stu[i+1].requ
if((fp=fopen("data.txt","wb"))==NULL)
{ printf("can not openn")return}
for(k=0k<=mk++)
if(fwrite(&stu[k] ,LEN,1,fp)!=1)
{ printf("can not save!")getch()}
fclose(fp)
}
void total()
{ FILE *fp
int m=0
if((fp=fopen("data.txt","r+"))==NULL)
{ printf("can not openn")return}
while(!feof(fp))
if(fread(&stu[m],LEN,1,fp)==1)
m++
if(m==0) {printf("no record!n")fclose(fp)return}
printf("the class are %d students!n",m)
fclose(fp)
}
#include <stdio.h>#include <stdlib.h>#include <string.h>#include <windows.h>struct stud_node{ long int ID //学号 int age //年龄 long int dormnumber,phonenumber //宿舍号码，电话号码 char name[15] //姓名 char sex //性别 struct student*next }struct stud_node*Create_Stu_Doc()//新建链表int main(void){ system("color 3E")FILE *fp=NULL//定义文件指针 fp=fopen("stud.txt","wb")if(fp==NULL) { printf("File open error n") exit (0)}struct stud_node*head,*p int choice,age long int ID,dormnumber,phonenumber char name[15],sex int size=sizeof(struct stud_node)printf("+---------------------------+n") printf("| 欢迎使用教务信息管理系统 |n") printf("+---------------------------+n")printf("ntt-----------------------------------------------------n") printf("tt+ 主菜单+n") printf("tt-----------------------------------------------------n") printf("tt+ [1]--录入学生资料 +n") printf("tt+ [0]--退出系统 +n") printf("tt-----------------------------------------------------n") printf("n") printf("tt请输入您的选择：")scanf("%d",&choice)switch(choice){case 0 : break case 1 : head=Create_Stu_Docbreak default:printf("n无效选项!") } }struct stud_node*Create_Stu_Doc()//新建链表{int y,agelong int ID,dormnumber,phonenumberchar name[15],sexint size=sizeof(struct stud_node)struct stud_node*head,*tail,*pFILE *fp=NULL//定义文件指针fp=fopen("stud.txt","r")head=tail=NULLprintf("--------------------n")printf("请输入学生的学号:")printf("请输入学生的姓名:")printf("请输入学生的性别:")printf("请输入学生的年龄:")printf("请输入学生的宿舍号码:")printf("请输入学生的电话号码:")while(!feof(fp)){p=(struct stud_node *)malloc(size) fscanf(fp,"%ld%c%c%d%ld%ld",&ID,&name,&sex,&age,&dormnumber,&phonenumber) p->ID=ID strcpy(p->name,name) strcpy(p->age,age) p->dormnumber=dormnumber p->phonenumber=phonenumber p->next=NULL if(head==NULL) head=p else tail->next=p tail=p }printf("n1.继续输入.n0.结束输入.n") printf("请选择：") scanf("%d",&y) if(y)return head fclose(fp)}
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