Linux下学生信息管理系统

1、学习并分别使用标准C的文件操作函数和Linux的系统调用创建一个对学生基本信息进行操作（插入、修改和删除）的C程序，学生基本信息以结构体的形式存储在文件#include<stdio.h>#include<unistd.h>#include<string.h>#include<stdlib.h>#include<time.h>struct stu_info char stu_num12;char name10;char sex;/*0为女生，1为男生*/char mobile_phone12;struct stu_info studen

2、t;unsigned int number;struct stu_info stu100;FILE *in;FILE *out;int len;void inputstu();void updatestu();void deletestu();void displaystu();void commanddisp()printf("-n"); printf("|-学生基本信息管理-|n");printf("|-1.基本信息插入.-2.基本信息修改-|n");printf("|-3.基本信息删除.-4.基本信息显示-|n&quo

3、t;);printf("|-r.初始化（第一次使用时用！慎用）-q.退出-|n");printf("|-请输入你的选择：-|n");printf("-n");void main()commanddisp();char ch;while(1)doch=getchar();while(ch='n');if(ch='q')return;switch(ch)case '1':inputstu(); break;case '2':updatestu();break;case 

4、9;3':deletestu();break;case '4':displaystu();break;case 'r':printf("ninit student tablen");if(out=fopen("c.doc","w")=NULL) return;number=0;fwrite(&number,sizeof(unsigned int),1,out);fflush(out);fclose(out);break;default:break;printf("please

5、enter any key to continue");getchar();getchar();system("clear");commanddisp();void inputstu()printf("n-请输入学生信息-n");char p='y'while(p='y'|p='Y')memset(&student,0,sizeof(student);printf("学号:");scanf("%s",student.stu_num);printf(&

6、quot;姓名:");scanf("%s",);printf("性别0是女，1是男:");dostudent.sex=getchar();while(student.sex='n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);if(out=fopen("c.doc","r+")=NULL) return;fread(&

7、amp;number,sizeof(unsigned int),1,out);number+;fseek(out,0L,SEEK_SET);fwrite(&number,sizeof(unsigned int),1,out);fflush(out);fseek(out,0L,SEEK_END);fwrite(&student,len,1,out);fflush(out);fclose(out);printf("是否继续输入YNn");fflush(stdin);dop=getchar();while(p='n');void updatestu

8、()printf("n-学生信息修改-n");printf("请输入修改学生的学号：");memset(&student,0,sizeof(student);scanf("%s",student.stu_num);printf("姓名:");scanf("%s",);printf("性别0是女，1是男:");dostudent.sex=getchar();while(student.sex='n');printf("手

9、机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);in=fopen("c.doc","r+");fread(&number,sizeof(unsigned int),1,in);unsigned int j;long kk;for(j=0;j<number;j+)fread(&stu0,len,1,in);if(strcmp(student.stu_num,stu0.stu_num)=0)kk=len;fseek(in,

10、-kk,SEEK_CUR);fwrite(&student,len,1,in);break;fflush(in);fclose(in);if(j=number)printf("没有这条记录n");void deletestu()printf("n-学生信息删除-n");in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);f

11、read(stu,len,number,in);unsigned int i;char f;while(1)printf("请输入删除学生的学号：");char stu_num12;memset(stu_num,0,sizeof(stu_num);fflush(stdin);scanf("%s",stu_num);for(i=0;i<number;i+)if(strcmp(stu_num,stui.stu_num)=0)break;if(i=number) printf("没有这条记录n");else number-;for(;

12、i<number;i+)strcpy(stui.stu_num,stui+1.stu_num);strcpy(,stui+1.name);stui.sex=stui+1.sex;strcpy(stui.mobile_phone,stui+1.mobile_phone);printf("是否继续删除YNn");fflush(stdin);dof=getchar();while(f='n');if(f!='y'&&f!='Y')break;fclose(in);out = fopen(&qu

13、ot;c.doc","w");fwrite(&number,sizeof(unsigned int),1,out);len=len*number;fwrite(stu,len,1,out);fflush(out);fclose(out);void displaystu()printf("n-显示学生信息-n");in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);le

14、n=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int i;printf("-n");printf("number t学号t 姓名t性别<0是女，1是男> 手机号n");for(i=0;i<number;i+)printf(" %3d %12s%10s %c %12sn",i,stui.stu_num,,stui.sex,stui.mobile_phone);printf("-n");fclose(in);

15、利用父子进程间的管道通信方式，改写实验3步骤6要求的程序。要求启用两个进程，其中父进程接受用户对文件的操作命令然后通过管道发给子进程，子进程完成对文件的实际操作。#include<stdio.h>#include<unistd.h>#include<string.h>#include<stdlib.h>#include<time.h>struct stu_info char stu_num12;char name10; char sex;/*0为女生，1为男生*/char mobile_phone12;struct s

16、tu_info student;unsigned int number;struct stu_info stu100;int pipefiles2;void main() printf("-n"); printf("|-学生基本信息管理-|n"); printf("|-1.基本信息插入.-2.基本信息修改-|n"); printf("|-3.基本信息删除.-4.基本信息显示-|n"); printf("|-r.初始化（第一次使用时用！慎用）-|n"); printf("|-请输入你的选

17、择：-|n:"); printf("-n"); pid_t pid;FILE *in;FILE *out;char ch;int len; if(pipe(pipefiles)=0) pid=fork(); if(pid=-1) fprintf(stderr,"Fork failuren");return; if(pid=0)/child.read(pipefiles0,&ch,1);switch(ch)case '1':while(1)sleep(1);len=sizeof(struct stu_info);char

18、*ch1=(char*)malloc(sizeof(char)*len);read(pipefiles0,ch1,len);if(out=fopen("c.doc","r+")=NULL) return;fread(&number,sizeof(unsigned int),1,out);number+;fseek(out,0L,SEEK_SET);fwrite(&number,sizeof(unsigned int),1,out);fclose(out);if(out=fopen("c.doc","a&quo

19、t;)=NULL) return;fwrite(ch1,len,1,out);fclose(out);char f;read(pipefiles0,&f,sizeof(char);if(f!='y'&&f!='Y') return;break;case '2':sleep(1);len=sizeof(struct stu_info);read(pipefiles0,&student,len);in=fopen("c.doc","r");fread(&number,si

20、zeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int j;for(j=0;j<number;j+)if(strcmp(student.stu_num,stuj.stu_num)=0)strcpy(,);stuj.sex=student.sex;strcpy(stuj.mobile_phone,student.mobile_phone);break;fclose(in);i

21、f(j=number)printf("没有这条记录n");elseout = fopen("c.doc","w");fwrite(&number,sizeof(unsigned int),1,out);len=sizeof(struct stu_info);len=len*number;fwrite(&stu,len,1,out);fclose(out);break;case '3':while(1)sleep(1);char stu_num12;memset(stu_num,0,sizeof(stu_

22、num);read(pipefiles0,stu_num,sizeof(stu_num);in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int i;for(i=0;i<number;i+)if(strcmp(stu_num,stui.stu_num)=0)break;if(i=number)

23、 printf("没有这条记录n");else for(;i<number-1;i+)strcpy(stui.stu_num,stui+1.stu_num);strcpy(,stui+1.name);stui.sex=stui+1.sex;strcpy(stui.mobile_phone,stui+1.mobile_phone);if(out=fopen("c.doc","r")=NULL) return;fread(&number,sizeof(unsigned int),1,out);fclose(

24、out);number-;out = fopen("c.doc","w");fwrite(&number,sizeof(unsigned int),1,out);len=sizeof(struct stu_info);len=len*number;fwrite(stu,len,1,out);fclose(out);char f;read(pipefiles0,&f,sizeof(int);if(f!='y'&&f!='Y') return;break;case '4':sle

25、ep(1);in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int i;printf("-n");for(i=0;i<number;i+)printf("-%d-学号： %s-姓名： %s-性别<0是女，1是男>： %c-手机号： %s-n"

26、,i,stui.stu_num,,stui.sex,stui.mobile_phone);printf("-n");fclose(in); break;case 'r':if(out=fopen("c.doc","w")=NULL) return;number=0;fwrite(&number,sizeof(unsigned int),1,out);break;default :break;else/father.doch=getchar();while(ch='n');wri

27、te(pipefiles1,&ch,1);switch(ch)case '1':printf("n-请输入学生信息-n");char p='y'while(p='y'|p='Y')memset(&student,0,sizeof(student);printf("学号:");scanf("%s",student.stu_num);printf("姓名:");scanf("%s",);print

28、f("性别0是女，1是男:");dostudent.sex=getchar();while(student.sex='n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);write(pipefiles1,&student,len);sleep(1);printf("是否继续输入YNn");fflush(stdin);dop=getchar();while(p='n');

29、write(pipefiles1,&p,sizeof(char); break;case '2':printf("n-学生信息修改-n");printf("请输入修改学生的学号：");memset(&student,0,sizeof(student);scanf("%s",student.stu_num);printf("姓名:");scanf("%s",);printf("性别0是女，1是男:");dostudent.

30、sex=getchar();while(student.sex='n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);write(pipefiles1,&student,len);sleep(2);break;case '3':printf("n-学生信息删除-n");while(1)printf("请输入删除学生的学号：");char stu_num12;memset

31、(stu_num,0,sizeof(stu_num);fflush(stdin);scanf("%s",stu_num);write(pipefiles1,stu_num,sizeof(stu_num);sleep(1);printf("是否继续删除YNn");fflush(stdin);char f;dof=getchar();while(f='n');write(pipefiles1,&f,sizeof(int);if(f!='y'&&f!='Y')return;break;ca

32、se '4':printf("n-显示学生信息-n");sleep(1);break;case 'r':printf("ninit student tablen");sleep(2);break;default:break; 学习并使用线程间的同步方法，重新改写实验3步骤6要求的程序。要求启用两个线程，其中主线程接受用户对文件的操作命令然后发给子线程，子线程完成对文件的实际操作（注意线程间的同步）。#include<stdio.h>#include<unistd.h>#include

33、<string.h>#include<stdlib.h>#include<time.h>#include<pthread.h>#include <semaphore.h>struct stu_info char stu_num12;char name10;char sex;/*0为女生，1为男生*/char mobile_phone12;struct stu_info student;unsigned int number;struct stu_info stu100;FILE *in;FILE *out;int len;sem_t

34、bin_sem;sem_t bin_sem1;char ch;void inputstu();void updatestu();void deletestu();void displaystu();void *stuthread(void *com);void commanddisp()printf("-n"); printf("|-学生基本信息管理-|n");printf("|-1.基本信息插入.-2.基本信息修改-|n");printf("|-3.基本信息删除.-4.基本信息显示-|n");printf(&qu

35、ot;|-r.初始化（第一次使用时用！慎用）-q.退出-|n");printf("|-请输入你的选择：-|n");printf("-n");void main()commanddisp();int res;pthread_t a_thread;void *thread_result;res = sem_init(&bin_sem,0,0);if (res != 0)perror("Semaphore initialition failed");exit(EXIT_FAILURE);res = sem_init(&am

36、p;bin_sem1,0,0);if (res != 0)perror("Semaphore initialition failed");exit(EXIT_FAILURE);res = pthread_create(&a_thread,NULL,stuthread,NULL);if(res != 0)perror("Thread creation failed");exit(EXIT_FAILURE);while(1)doch=getchar();while(ch='n');if(ch='q')sem_post(

37、&bin_sem);break;sem_post(&bin_sem);sem_wait(&bin_sem1);printf("please enter any key to continue");getchar();getchar();system("clear");commanddisp();res = pthread_join(a_thread,&thread_result);if(res != 0)perror("Thread join failed");exit(EXIT_FAILURE);se

38、m_destroy(&bin_sem);sem_destroy(&bin_sem1);exit(EXIT_SUCCESS);void *stuthread(void *com)sem_wait(&bin_sem);while(ch!='q')switch(ch)case '1':inputstu(); break;case '2':updatestu();break;case '3':deletestu();break;case '4':displaystu();break;case 

39、9;r':printf("ninit student tablen");if(out=fopen("c.doc","w")=NULL) exit(EXIT_FAILURE);number=0;fwrite(&number,sizeof(unsigned int),1,out);fflush(out);fclose(out);break;default:break;sem_post(&bin_sem1);sem_wait(&bin_sem);pthread_exit(NULL);void inputstu

40、()printf("n-请输入学生信息-n");char p='y'while(p='y'|p='Y')memset(&student,0,sizeof(student);printf("学号:");scanf("%s",student.stu_num);printf("姓名:");scanf("%s",);printf("性别0是女，1是男:");dostudent.sex=getchar();

41、while(student.sex='n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);if(out=fopen("c.doc","r+")=NULL) return;fread(&number,sizeof(unsigned int),1,out);number+;fseek(out,0L,SEEK_SET);fwrite(&number,sizeof(unsigned i

42、nt),1,out);fflush(out);fseek(out,0L,SEEK_END);fwrite(&student,len,1,out);fflush(out);fclose(out);printf("是否继续输入YNn");fflush(stdin);dop=getchar();while(p='n');void updatestu()printf("n-学生信息修改-n");printf("请输入修改学生的学号：");memset(&student,0,sizeof(student);sca

43、nf("%s",student.stu_num);printf("姓名:");scanf("%s",);printf("性别0是女，1是男:");dostudent.sex=getchar();while(student.sex='n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(struct stu_info);in=fopen("c.doc&quo

44、t;,"r+");fread(&number,sizeof(unsigned int),1,in);unsigned int j;long kk;for(j=0;j<number;j+)fread(&stu0,len,1,in);if(strcmp(student.stu_num,stu0.stu_num)=0)kk=len;fseek(in,-kk,SEEK_CUR);fwrite(&student,len,1,in);break;fflush(in);fclose(in);if(j=number)printf("没有这条记录n&q

45、uot;);void deletestu()printf("n-学生信息删除-n");in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int i;char f;while(1)printf("请输入删除学生的学号：");char stu_num12;memse

46、t(stu_num,0,sizeof(stu_num);fflush(stdin);scanf("%s",stu_num);for(i=0;i<number;i+)if(strcmp(stu_num,stui.stu_num)=0)break;if(i=number) printf("没有这条记录n");else number-;for(;i<number;i+)strcpy(stui.stu_num,stui+1.stu_num);strcpy(,stui+1.name);stui.sex=stui+1.sex;strcp

47、y(stui.mobile_phone,stui+1.mobile_phone);printf("是否继续删除YNn");fflush(stdin);dof=getchar();while(f='n');if(f!='y'&&f!='Y')break;fclose(in);out = fopen("c.doc","w");fwrite(&number,sizeof(unsigned int),1,out);len=len*number;fwrite(stu,len

48、,1,out);fflush(out);fclose(out);void displaystu()printf("n-显示学生信息-n");in=fopen("c.doc","r");fread(&number,sizeof(unsigned int),1,in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int i;printf("-n");printf("numb

49、er t学号t 姓名t性别<0是女，1是男> 手机号n");for(i=0;i<number;i+)printf(" %3d %12s%10s %c %12sn",i,stui.stu_num,,stui.sex,stui.mobile_phone);printf("-n");fclose(in); 学习并使用IPC中信号量和共享内存的使用方法，重新改写实验3步骤6要求的程序。要求启动多个进程，每一个进程都可以单独对文件进行操作，进程间通过信号量进行同步，对文件的操作映射到共享内存中。#include<

50、stdio.h>#include<unistd.h>#include<string.h>#include<stdlib.h>#include<time.h>#include <sys/shm.h>#include <sys/types.h>#include <sys/ipc.h>#include <sys/sem.h>#include "semun.h"struct stu_info char stu_num12;char name10;char sex;/*0为女生，1为

51、男生*/char mobile_phone12;struct stu_info student;unsigned int number;struct stu_info stu100;FILE *in;FILE *out;int len;static int sem_id;void inputstu();void updatestu();void deletestu();void displaystu();void set_semvalue();void del_semvalue();void semaphore_p();void semaphore_v();void commanddisp()printf("-n&