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1、精选优质文档-倾情为你奉上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专心-专注-专业#include#include#include#include#includestruct 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;FI
2、LE *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);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 c
3、h;while(1)doch=getchar();while(ch=n);if(ch=q)return;switch(ch)case 1:inputstu(); break;case 2:updatestu();break;case 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);fc
4、lose(out);break;default:break;printf(please 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(姓名:);scanf(%s,student.name);printf(性别0是女，1是男
5、:);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(&number,sizeof(unsigned int),1,out);number+;fseek(out,0L,SEEK_SET);fwrite(&number,sizeof(unsigned int),1,out);fflush(out);fseek(out,0L,SEE
6、K_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);scanf(%s,student.stu_num);printf(姓名:);scanf(%s,student.name);printf(性别0是女，1是男:);dostudent.sex=ge
7、tchar();while(student.sex=n);printf(手机号:);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;jnumber;j+)fread(&stu0,len,1,in);if(strcmp(student.stu_num,stu0.stu_num)=0)kk=len;fseek(in,-kk,SEEK_CUR);fwr
8、ite(&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);fread(stu,len,number,in);unsigned int i;char f;while(1)printf(请输入删除学生的学号：)
9、;char stu_num12;memset(stu_num,0,sizeof(stu_num);fflush(stdin);scanf(%s,stu_num);for(i=0;inumber;i+)if(strcmp(stu_num,stui.stu_num)=0)break;if(i=number) printf(没有这条记录n);else number-;for(;inumber;i+)strcpy(stui.stu_num,stui+1.stu_num);strcpy(stui.name,stui+1.name);stui.sex=stui+1.sex;strcpy(stui.mobi
10、le_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,1,out);fflush(out);fclose(out);void displaystu()printf(n-显示学生信息-n);in=fopen(c.doc,r);frea
11、d(&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(number t学号t 姓名t性别 手机号n);for(i=0;inumber;i+)printf( %3d %12s%10s %c %12sn,i,stui.stu_num,stui.name,stui.sex,stui.mobile_phone);printf(-n);fclose(in); 利用父
12、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stu.info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#include#include#include#includestruct 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;int pipefiles2;void m
13、ain() 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);retu
14、rn; if(pid=0)/child.read(pipefiles0,&ch,1);switch(ch)case 1:while(1)sleep(1);len=sizeof(struct stu_info);char *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,size
15、of(unsigned int),1,out);fclose(out);if(out=fopen(c.doc,a)=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,sizeof(unsigned int),1,
16、in);memset(stu,0,sizeof(stu);len=sizeof(struct stu_info);fread(stu,len,number,in);unsigned int j;for(j=0;jnumber;j+)if(strcmp(student.stu_num,stuj.stu_num)=0)strcpy(stuj.name,student.name);stuj.sex=student.sex;strcpy(stuj.mobile_phone,student.mobile_phone);break;fclose(in);if(j=number)printf(没有这条记录n
17、);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_num);read(pipefiles0,stu_num,sizeof(stu_num);in=fopen(c.doc,r);fread(&number,si
18、zeof(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;inumber;i+)if(strcmp(stu_num,stui.stu_num)=0)break;if(i=number) printf(没有这条记录n);else for(;inumber-1;i+)strcpy(stui.stu_num,stui+1.stu_num);strcpy(stui.name,stui+1.name);stui.
19、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(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);c
20、har f;read(pipefiles0,&f,sizeof(int);if(f!=y&f!=Y) return;break;case 4:sleep(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;inumber;i+)printf(-%d-学号： %s-姓名： %s-性别： %c-手机号： %
21、s-n,i,stui.stu_num,stui.name,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);write(pipefiles1,&ch,1);switch(ch)case 1:printf(n-请输入学生信息-n)
22、;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,student.name);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);write(pipefiles1,&student,len);sl
23、eep(1);printf(是否继续输入YNn);fflush(stdin);dop=getchar();while(p=n);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,student.name);printf(性别0是女，1是男:);dostudent.sex=getchar();while(studen
24、t.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(stu_num,0,sizeof(stu_num);fflush(stdin);scanf(%s,stu_num);write(pipefiles1,stu_num,sizeof(stu_num
25、);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;case 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stu.info的
26、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#include#include#include#include#include#include 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 bin_sem;sem_t bin_sem1
27、;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(|-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()
28、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(&bin_sem1,0,0);if (res != 0)perror(Semaphore initialition failed);exit(EXIT_FAILURE);res = pthread_create(&a_thread,NULL,stut
29、hread,NULL);if(res != 0)perror(Thread creation failed);exit(EXIT_FAILURE);while(1)doch=getchar();while(ch=n);if(ch=q)sem_post(&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,&t
30、hread_result);if(res != 0)perror(Thread join failed);exit(EXIT_FAILURE);sem_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();br
31、eak;case 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()printf(n-请输入学生信息-n);char p=y;while(p=y|p=Y)m
32、emset(&student,0,sizeof(student);printf(学号:);scanf(%s,student.stu_num);printf(姓名:);scanf(%s,student.name);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(&number,sizeof(u
33、nsigned 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()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,student.name);printf(