//**************************************************************************** //**** 说明：密码所在的文件位于c盘，文件名为1.txt。

//**** 学生基本信息最好保存在C盘，文件名为student.txt。

//**************************************************************************** #include <stdio.h>#include <stdlib.h>#include <string.h>#define N 3struct student{char name[10];char no[10];char sex;int age;char bnote[100];};void print(bool menu)//打印基本信息{if (!menu){printf("学生基本信息录入,press 1\n");}else{printf("学生基本信息显示,press 2\n");printf("学生基本信息保存,press 3\n");printf("学生基本信息删除,press 4\n");printf("学生基本信息修改,press 5\n");printf("学生基本信息查询,press 6\n");}printf("退出学生信息系统,press 7\n");}bool Check(char pas[6])//密码验证{FILE *fp;char ch;char a[7]={" "};int i = 0;if ((fp=fopen("c:\\1.txt","r"))==NULL){printf("打开文件失败!\n");exit(0);ch=fgetc(fp);while (ch!=EOF&&i<6){a[i] = ch;ch=fgetc(fp);i++;}a[6] = '\0';if (!strcmp(pas,a)){return true;}else{printf("密码错误\n");return false;}fclose(fp);}void GetInfo(struct student *arr,int n)//学生基本信息录入{for (int i = 0;i<n;i++){printf("输入学生的基本信息:name no sex age bnote\n");scanf("%s %s %c %d %s",arr[i].name,arr[i].no,&arr[i].sex,&arr[i].age,arr[i].bnote);}}void Display(struct student* arr,int n)//学生基本信息显示{printf("学生信息: Name NO Sex age Note\n");for (int i = 0;i<n;i++){printf("%15s%15s%15c%15d%15s\n",arr[i].name,arr[i].no,arr[i].sex,arr[i].age,arr[i].bnote); }}void Save(struct student* arr,int n)//学生基本信息保存，保存在c:\\student.txt{FILE * fp;fp= fopen("c:\\student.txt","w+");if (fp == NULL)printf("文件不存在!\n");exit(0);}fwrite(arr,sizeof(struct student)*n,n,fp);fclose(fp);}void Modfiy(struct student* arr,int n)//学生基本信息修改{char number[10];bool flag=false;char pass[6];printf("请输入密码:\n");scanf("%s",pass);if (Check(pass)){printf("修改学生信息:\n");printf("请输入学号:\n");scanf("%s",number);for (int i =0;i<n;i++){if (!strcmp(number,arr[i].no)){printf("infor: name no sex age note\n");printf("%12s%12s%12c%12d%12s\n",arr[i].name,arr[i].no,arr[i].sex,arr[i].age,arr[i].bnote);printf("please input information:\n");scanf("%s%s%c%d%s",arr[i].name,arr[i].no,&arr[i].sex,&arr[i].age,arr[i].bnote);Save(arr,n);flag = true;}}if (flag == false){printf("该学生不存在!:\n");}}}void Delete(struct student* arr,int n)//学生基本信息删除{char number[10];bool flag=false;printf("Delete information:\n");printf("please input the no:\n");scanf("%s",number);for (int i =0;i<n;i++){if (!strcmp(number,arr[i].no)){strcpy(arr[i].name," ");strcpy(arr[i].no," ");strcpy(arr[i].bnote," ");arr[i].sex = ' ';arr[i].age = 0;Save(arr,n);flag = true;}}if (flag == true){printf("该学生不存在!:\n");}}void Search(struct student* arr,int n)//学生基本信息查询{int temp,i;bool flag=false;printf("---------------通过学号查询,press 1-------------\n");printf("---------------通过姓名查询,press 2-----------\n");printf("---------------通过性别查询,press 3------------\n");printf("---------------通过年龄查询,press 4------------\n");printf("---------------退出,press 5 ------------\n");scanf("%d",&temp);switch (temp){case 1://按照学号查询{char num[10];printf("请输入学号:\n");scanf("%s",num);for ( i =0;i<n;i++){if (!strcmp(num,arr[i].no)){printf("%12s%12s%12c%12d%12s\n",arr[i].name,arr[i].no, arr[i].sex,arr[i].age,arr[i].bnote);flag = true;}}if (!flag){printf("该学生不存在.\n");}}break;case 2://按照名字查询{char num[10];printf("please input name:\n");scanf("%s",num);for ( i =0;i<n;i++){if (!strcmp(num,arr[i].name)){printf("%12s%12s%12c%12d%12s",arr[i].name,arr[i].no,arr[i].sex,arr[i].age,arr[i].bnote);flag = true;}}if (!flag){printf("该学生不存在.\n");}}break;case 3://按照性别查询{char ch;printf("请输入性别:\n");//scanf("%c",&ch);ch = getchar();for ( i =0;i<n;i++){if (ch == arr[i].sex){printf("%12s%12s%12c%12d%12s\n",arr[i].name,arr[i].no,arr[i].sex,arr[i].age,arr[i].bnote);flag = true;}}if (!flag){printf("t该学生不存在.\n");}}break;case 4://按照年龄查询{char num_age;printf("请输入年龄:\n");scanf("%d",&num_age);for ( i =0;i<n;i++){if (num_age == arr[i].age){printf("%12s%12s%12c%12d%12s\n",arr[i].name,arr[i].no,arr[i].sex,arr[i].age,arr[i].bnote);flag = true;}}if (!flag){printf("该学生不存在.\n");}}break;default:break;}}void main(){struct student arr[N];char ps[6];bool flag =false;printf("请输入密码:\n");scanf("%s",ps);flag = Check(ps);if (flag){int select;print(false);scanf("%d",&select);while (0<select && select <7 ) {switch (select){case 1:GetInfo(arr,N);print(true);break;case 2:Display(arr,N);print(true);break;case 3:Save(arr,N);print(true);break;case 4:Delete(arr,N);print(true);break;case 5:Modfiy(arr,N);print(true);break;case 6:Search(arr,N);print(true);break;default:break;}printf("请选择:\n");scanf("%d",&select);}}}。