#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 *** 作得到保存，请按正常顺序退出系统^_^\n")
do
{
printf("\n\t\t\t--------------------------------\n")
printf("\t\t\t+主菜单|\n")
printf("\t\t\t--------------------------------\n")
printf("\t\t\t+[1]----录入学生信息 |\n")
printf("\t\t\t+[2]----浏览学生信息 |\n")
printf("\t\t\t+[3]----查询学生信息 |\n")
printf("\t\t\t+[4]----删除学生信息 |\n")
printf("\t\t\t+[5]----修改学生信息 |\n")
printf("\t\t\段腔t+[0]----退出系统 |\n")
printf("\t\t\t--------------------------------\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()/*录入函数*/改销
{
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:"握歼衫)
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()/*浏览函数*/
{
int i,j
if(n!=0)
{ printf("学生总数:%d\n", n)
printf("学号\t姓名\t年龄\t性别\t地址\t\t电话\n")
printf("-----------------------------------------------------\n")
for(i=0i<ni++)
printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",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()/*查询函数*/
{
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\t\t电话\n")
printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",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\t\t电话\n")
j=1
printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",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()/*修改函数*/
{
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()/*删除函数*/
{
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\t\t电话\n")
printf("-----------------------------------------------------\n")
for(i=0i<ni++)
printf("%ld\t%s\t%d\t%s\t%s\t\t%s\n",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<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%-12.1lf\n"
#define DATA stu[i].num,stu[i].name,stu[i].elec,stu[i].expe,stu[i].requ,stu[i].sum
struct student/*定义学生成绩结构体*/
{ int num/*学号*/
char name[15]/*姓名*/
double elec/*选修课*/
double expe/*实验课*/
double requ/*必修课*/
double sum/*总分*/
}
struct student stu[50]/*定义结构体数组*/
void in()/*录入学生成绩信息*/
void show()/*显示学生信息*/
void order()/*按总分排序*/
void del()/*删除学生成绩信息*/
void modify()/*修改学生成绩信息*/
void menu()/*主菜单*/
void insert()/*插入学生信息*/
void total()/*计算总人数*/
void search()/*查找学生信息*/
void main()/*主函数*/
{ int n
menu()
scanf("%d",&n)/*输入选择功能的编号*/
while(n)
{ switch(n)
{ case 1: in()break
case 2: search()break
case 3: del()break
case 4: modify()break
case 5: insert()break
猜友稿case 6: order()break
case 7: total()break
case 8: show()break
default:break
}
getch()
menu()/*执行完功能再次显示菜单界面*/
scanf("%d",&n)
}
}
void in()/*录入学生信息*/
{ int i,m=0/*m是记录的条数*/
char ch[2]
FILE *fp/*定义文件指针*/
if((fp=fopen("data.txt","a+"))==NULL)/*打开指定文件*/
{
printf("can not open\n")
return
}
while(!feof(fp))
{
if(fread(&stu[m] ,LEN,1,fp)==1)
m++/*统计当前记录条数*/
穗孝 }
fclose(fp)
if(m==0)
printf("No record!\n")
else
{
system("cls")
show()/*调用show函数，显示原有信息*/
}
if((fp=fopen("data.txt","wb"))==NULL)
{
printf("can not open\n")
return
}
for(i=0i<mi++)
fwrite(&stu[i] ,LEN,1,fp)/*向指定的磁盘文件写入信息*/
printf("please input(y/n):")
scanf("%s",ch)
while(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)/*判断是否要录入新信息*/
{
printf("number:")
scanf("%d",&stu[m].num)/*输入学生学号*/
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)/*输入学生姓名*/
printf("elective:")
scanf("%lf",&stu[m].elec)/*输入选修告亩课成绩*/
printf("experiment:")
scanf("%lf",&stu[m].expe)/*输入实验课成绩*/
printf("required course:")
scanf("%lf",&stu[m].requ)/*输入必修课成绩*/
stu[m].sum=stu[m].elec+stu[m].expe+stu[m].requ/*计算出总成绩*/
if(fwrite(&stu[m],LEN,1,fp)!=1)/*将新录入的信息写入指定的磁盘文件*/
{
printf("can not save!")
getch()
}
else
{
printf("%s saved!\n",stu[m].name)
m++
}
printf("continue?(y/n):")/*询问是否继续*/
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 sum\t\n")
for(i=0i<mi++)
{
printf(FORMAT,DATA)/*将信息按指定格式打印*/
}
}
void menu()/*自定义函数实现菜单功能*/
{
system("cls")
printf("\n\n\n\n\n")
printf("\t\t|---------------------STUDENT-------------------|\n")
printf("\t\t|\t 0. exit |\n")
printf("\t\t|\t 1. input record |\n")
printf("\t\t|\t 2. search record |\n")
printf("\t\t|\t 3. delete record |\n")
printf("\t\t|\t 4. modify record |\n")
printf("\t\t|\t 5. insert record |\n")
printf("\t\t|\t 6. order |\n")
printf("\t\t|\t 7. number |\n")
printf("\t\t|\t 8. show |\n")
printf("\t\t|-----------------------------------------------|\n\n")
printf("\t\t\tchoose(0-8):")
}
void order()/*自定义排序函数*/
{ 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 open\n")
return}
for(i=0i<m-1i++)
for(j=i+1j<mj++)/*双重循环实现成绩比较并交换*/
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 open\n")return}
for(i=0i<mi++)/*将重新排好序的内容重新写入指定的磁盘文件中*/
if(fwrite(&stu[i] ,LEN,1,fp)!=1)
{
printf("%s can not save!\n")
getch()
}
fclose(fp)
printf("save successfully\n")
}
void del()/*自定义删除函数*/
{FILE *fp
int snum,i,j,m=0
char ch[2]
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
}
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)/*判断是否要进行删除*/
for(j=ij<mj++)
stu[j]=stu[j+1]/*将后一个记录移到前一个记录的位置*/
m--/*记录的总个数减1*/
if((fp=fopen("data.txt","wb"))==NULL)
{ printf("can not open\n")return}
for(j=0j<mj++)/*将更改后的记录重新写入指定的磁盘文件中*/
if(fwrite(&stu[j] ,LEN,1,fp)!=1)
{ printf("can not save!\n")
getch()}
fclose(fp)
printf("delete successfully!\n")
}
void search()/*自定义查找函数*/
{ FILE *fp
int snum,i,m=0
char ch[2]
if((fp=fopen("data.txt","rb"))==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}
printf("please input the number:")
scanf("%d",&snum)
for(i=0i<mi++)
if(snum==stu[i].num)/*查找输入的学号是否在记录中*/
{ 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 sum\t\n")
printf(FORMAT,DATA)/*将查找出的结果按指定格式输出*/
break
}
}
if(i==m) printf("can not find the student!\n")/*未找到要查找的信息*/
}
void modify()/*自定义修改函数*/
{ FILE *fp
int i,j,m=0,snum
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++
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)/*检索记录中是否有要修改的信息*/
break
printf("find the student!you can modify!\n")
printf("name:")
scanf("%s",stu[i].name)/*输入名字*/
printf("elective:")
scanf("%lf",&stu[i].elec)/*输入选修课成绩*/
printf("experiment:")
scanf("%lf",&stu[i].expe)/*输入实验课成绩*/
printf("required course:")
scanf("%lf",&stu[i].requ)/*输入必修课成绩*/
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 open\n")return}
for(j=0j<mj++)/*将新修改的信息写入指定的磁盘文件中*/
if(fwrite(&stu[j] ,LEN,1,fp)!=1)
{ printf("can not save!") getch() }
fclose(fp)
}
void insert()/*自定义插入函数*/
{ FILE *fp
int i,j,k,m=0,snum
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++
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)/*输入要插入的位置*/
for(i=0i<mi++)
if(snum==stu[i].num)
break
for(j=m-1j>ij--)
stu[j+1]=stu[j]/*从最后一条记录开始均向后移一位*/
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 open\n")return}
for(k=0k<=mk++)
if(fwrite(&stu[k] ,LEN,1,fp)!=1)/*将修改后的记录写入磁盘文件中*/
{ printf("can not save!") getch() }
fclose(fp)
}
void total()
{ FILE *fp
int 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++/*统计记录个数即学生个数*/
if(m==0) {printf("no record!\n")fclose(fp)return}
printf("the class are %d students!\n",m)/*将统计的个数输出*/
fclose(fp)
}
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