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>structstu_info{charstu_num[12];charname[10];charsex;/*0为女生，1为男生*/charmobile_phone[12];};structstu_infostudent;unsignedintnumber;structstu_infostu[100];FILE*in;FILE*out;intlen;voidinputstu();voidupdatestu();voiddeletestu();voiddisplaystu();voidcommanddisp(){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");}voidmain(){commanddisp();charch;while(1){do{ch=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("\ninitstudenttable\n");if((out=fopen("c.doc","w"))==NULL)return;number=0;fwrite(&number,sizeof(unsignedint),1,out);fflush(out);fclose(out);break;default:break;}printf("pleaseenteranykeytocontinue");getchar();getchar();system("clear");commanddisp();}}voidinputstu(){printf("\n-----------------请输入学生信息----------------------\n");charp='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＞:");do{student.sex=getchar();}while(student.sex=='\n');printf("手机号:");scanf("%s",student.mobile_phone);len=sizeof(structstu_info);if((out=fopen("c.doc","r+"))==NULL)return;fread(&number,sizeof(unsignedint),1,out);number++;fseek(out,0L,SEEK_SET);fwrite(&number,sizeof(unsignedint),1,out);fflush(out);fseek(out,0L,SEEK_END);fwrite(&student,len,1,out);fflush(out);fclose(out);printf("是否继续输