学生基本信息管理系统(LINUX下)

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; &

2、#160;   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;void inputstu();void updatestu();void deletestu();void displaystu();void commanddisp()    printf("-n&

3、quot;);      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");   

4、0; printf("|-请输入你的选择：-|n");     printf("-n");void main()    commanddisp();     char ch;     while(1)              do     

5、;         ch=getchar();         while(ch='n');         if(ch='q')return;         switch(ch)     

6、60;            case '1':              inputstu();              break;        

7、 case '2':              updatestu();              break;         case '3':      

8、0;       deletestu();              break;         case '4':              displaystu(); 

9、             break;         case 'r':              printf("ninit student tablen");      

10、;        if(out=fopen("c.doc","w")=NULL) return;              number=0;              fwrite(&number,sizeof(unsi

11、gned int),1,out);              fflush(out);              fclose(out);              break;   

12、60;     default:              break;                  printf("please enter any key to continue");    

13、0;    getchar();         getchar();         system("clear");         commanddisp();     void inputstu()     printf(

14、"n-请输入学生信息-n");       char p='y'     while(p='y'|p='Y')              memset(&student,0,sizeof(student);         print

15、f("学号:");         scanf("%s",student.stu_num);         printf("姓名:");         scanf("%s",);      &

16、#160;  printf("性别0是女，1是男:");         do              student.sex=getchar();         while(student.sex='n');    &

17、#160;           printf("手机号:");         scanf("%s",student.mobile_phone);         len=sizeof(struct stu_info);       

18、60; if(out=fopen("c.doc","r+")=NULL) return;         fread(&number,sizeof(unsigned int),1,out);         number+;         fseek(out,0L,SEEK_SET);  

19、       fwrite(&number,sizeof(unsigned int),1,out);         fflush(out);         fseek(out,0L,SEEK_END);         fwrite(&student,len,1,out);

20、60;        fflush(out);         fclose(out);         printf("是否继续输入YNn");         fflush(stdin);      

21、60;  do              p=getchar();         while(p='n');     void updatestu()     printf("n-学生信息修改-n");     print

22、f("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("

23、性别0是女，1是男:");     do         student.sex=getchar();     while(student.sex='n');            printf("手机号:");     scanf("%s&q

24、uot;,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; 

25、60;   for(j=0;j<number;j+)              fread(&stu0,len,1,in);         if(strcmp(student.stu_num,stu0.stu_num)=0)            

26、60;         kk=len;              fseek(in,-kk,SEEK_CUR);              fwrite(&student,len,1,in);     

27、         break;                   fflush(in);     fclose(in);     if(j=number)printf("没有这条记录n");void deletestu()   

28、  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);

29、60;    fread(stu,len,number,in);        unsigned int i;     char f;     while(1)              printf("请输入删除学生的学号：");     

30、;    char stu_num12;         memset(stu_num,0,sizeof(stu_num);         fflush(stdin);         scanf("%s",stu_num);       

31、;  for(i=0;i<number;i+)                       if(strcmp(stu_num,stui.stu_num)=0)break;             if(i=number) printf("没有

32、这条记录n");            else                        number-;              for(;i<

33、number;i+)                                 strcpy(stui.stu_num,stui+1.stu_num);           

34、        strcpy(,stui+1.name);                   stui.sex=stui+1.sex;                &#

35、160;  strcpy(stui.mobile_phone,stui+1.mobile_phone);                                printf("是否继续删除YNn");      

36、   fflush(stdin);         do              f=getchar();         while(f='n');         if(f!='y'&&f!='Y')break;          fclose(in);     ou