#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <time.h>
#include <conio.h>
//#include <unistd.h>
void menus();
void input();
void display();
void save();
int my_delete();
void end();
int password();
int login();
int cpassword();
int alter();
void demand();
void _menus();
void out();
void _menus2();
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int num=0;//当前数组中存储的数据量 
struct node{
	char stnum[20];
	char stname[20];
	char sex[8];
	int age;
	char detail[100];
}student[1000]; 

int main(int argc, char *argv[]) {
	
	if(!login())return 0;
	menus();
	char choice;
	while(1){
		printf("请输入正确选项!\n");
		choice=getch();
		system("cls");
		switch(choice){
			case '1':
				input();
				end();
				break;
			case '2':
				display();
				break;
			case '3':
				printf("\a保存后将退出系统\n是否继续？\n继续则输入'Y'\n按其他任意键取消\n");
				char ch;
				ch=getch();
				if(ch=='Y'||ch=='y'){
					save();
					out();
					return 0;
				}
				break;
			case '4':
				if(my_delete()!=1){
					out();
					return 0;
				}
				break;
			case '5':
				if(alter()!=1){
					out();
					return 0;
				}
				break;
			case '6':
				demand();
				break;
			case '7':
				if(cpassword()!=1){
					out();
					return 0;
				}
				break;
			case '8':
				out();
				return 0; 
			default:
				system("cls");
				end();
				break;
		}
		system("cls");
		menus();
	}
	return 0;
}

void out()
{
	system("cls");
	printf("本次使用到此结束！\n即将退出程序！\n");
	for(int i=3;i>0;i--){
		printf("%d秒后退出程序！\n",i);
		Sleep(1000);
	}
}

void menus()
{
	printf("\t\t\t\t**********请选择系统功能选项**************\n");
	printf("\t\t\t\t*--------1 学生基本信息录入--------------*\n");
	printf("\t\t\t\t*--------2 学生基本信息显示--------------*\n");
	printf("\t\t\t\t*--------3 学生基本信息保存--------------*\n");
	printf("\t\t\t\t*---4 学生基本信息删除(此选项须输入密码)-*\n");
	printf("\t\t\t\t*---5 学生基本信息修改(此选项须输入密码)-*\n");
	printf("\t\t\t\t*--------6 学生基本信息查询--------------*\n");
	printf("\t\t\t\t*------------7 密码修改------------------*\n");
	printf("\t\t\t\t*------------8 退出系统------------------*\n");
	printf("\t\t\t\t******************************************\n\n");
}

void input()
{
	int n=0; 
	char c='0';
	int falg=1;
	printf("请输入你要录入的学生信息数：\n");
	do{
		c=getch();
		if(c>'9'||c<'0'){
			system("cls"); 
			printf("数值非法！！！\n请重新输入！\n");
		}
	}while(c>'9'||c<'0');
	n=c-'0';
	printf("你选择录入%d名学生！\n",n);
	if(num+n+1>=1000){
		printf("本次录入只能录入%d名学生！\n",1000-num-1);
		falg=0;
	}
	for(int i=num;i<n+num;i++){
		if(i==num)printf("请输入学生基本信息！\n");
		printf("学号\t姓名\t性别\t年龄\t备注\n");
		if(!falg){
			printf("您还可以录入%d名学生！",1000-i-1);
			scanf("%s %s %s %d %s",&student[i].stnum,&student[i].stname,&student[i].sex,&student[i].age,&student[i].detail);
		}else{
			scanf("%s %s %s %d %s",&student[i].stnum,&student[i].stname,&student[i].sex,&student[i].age,&student[i].detail);
		}
		if(i!=n+num-1)printf("请输入下一名学生基本信息！\n");
	}
	if(!falg)num=1000;
	else num+=n;
	printf("录入成功！\a\n");
	Sleep(1000);
}

void display()
{
	struct node tem[1000];
	int i=0;
	printf("已保存的名学生基本信息：\n");
	FILE *fp=fopen("data.txt","r");
	while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
		printf("学号:%-12s姓名:%-8s\t性别:%-4s\t年龄:%-4d\t备注:%-4s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
		i++;
	}
	fclose(fp);
	end();
}

void save()
{
	FILE *fp;
	fp=fopen("data.txt","a+");
	if(fp==NULL){
		printf("文件打开失败！\n即将返回菜单\n");
		return ;
	}
	for(int i=0;i<num;i++){
		fprintf(fp,"%s\t%s\t%s\t%d\t%s\n",student[i].stnum,student[i].stname,student[i].sex,student[i].age,student[i].detail);
	}
	printf("已录入%d名学生基本信息！\a\n",num);
	Sleep(1000);
	int c=fclose(fp);
	if(c!=0){
		printf("文件打开失败！\n");
	}
}

int my_delete()
{
	display();
	if(password()==0)return 0;
	struct node tem[1000];
	FILE *fp=fopen("data.txt","r");
	FILE *out=fopen("data2.txt","w");
	int i=0;
	char s[20];
	printf("仅支持按学号删除！！\n");
	printf("请输入您所要删除的信息的相关学号：");
	scanf("%s",s);
	while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
		if(strcmp(s,tem[i].stnum)!=0)fprintf(out,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
		i++;
	}
	fclose(fp);
	fclose(out);
	unlink("data.txt");
	rename("data2.txt","data.txt");
	printf("删除完成！\a");
	Sleep(500);
	system("cls");
	return 1;
}

int alter()
{
	display();
	if(password()==0)return 0;
	struct node tem[1000];
	FILE *fp;
	fp=fopen("data.txt","r");
	FILE *ou;
	ou=fopen("data2.txt","w");
	int i=0;
	char s[20];
	char t[20];
	int d;
	printf("仅支持按学号修改！！\n");
	printf("请输入您所要删除的信息的相关学号：");
	scanf("%s",s);
	system("cls");
	_menus2();
	printf("请选择你的选项！\n");
	char cho;
	while(1){
		cho=getch();
		if(cho<'5'&&cho>'0')break;
		else printf("数值非法请重新输入！\n");
	}
	printf("您选择的是%d选项\n",cho-'0');
	printf("\n请输入数据："); 
	switch (cho){
		case '1':
			scanf("%s",t);
			while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
				if(strcmp(s,tem[i].stnum)==0)
				{
					fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",t,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
					printf("学号:%-12s姓名:%-8s\t性别:%-4s\t年龄:%-4d\t备注:%-4s\n",t,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
				}
				else fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
				i++;
			}
			break;
		case '2':
			scanf("%s",t);
			while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
				if(strcmp(s,tem[i].stnum)==0)
				{
					fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,t,tem[i].sex,tem[i].age,tem[i].detail);
					printf("学号:%-12s姓名:%-8s\t性别:%-4s\t年龄:%-4d\t备注:%-4s\n",tem[i].stnum,t,tem[i].sex,tem[i].age,tem[i].detail);
				}
				else fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
				i++;
			}
			break;
		case '3':
			scanf("%s",t);
			while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
				if(strcmp(s,tem[i].stnum)==0)
				{
					fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,t,tem[i].age,tem[i].detail);
					printf("学号:%-12s姓名:%-8s\t性别:%-4s\t年龄:%-4d\t备注:%-4s\n",tem[i].stnum,tem[i].stname,t,tem[i].age,tem[i].detail);
				}
				else fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
				i++;
			}
			break;
		case '4':
			scanf("%d",&d);
			while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
				if(strcmp(s,tem[i].stnum)==0)
				{
					fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,d,tem[i].detail);
					printf("学号:%-12s姓名:%-8s\t性别:%-4s\t年龄:%-4d\t备注:%-4s\n",tem[i].stnum,tem[i].stname,tem[i].sex,d,tem[i].detail);
				}
				else fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
				i++;
			}
			break;
		default:
			out();
			return 1;
	}
	while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
		if(strcmp(s,tem[i].stnum)!=0)fprintf(ou,"%s\t%s\t%s\t%d\t%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
		i++;
	}
	fclose(fp);
	fclose(ou);
	unlink("data.txt");
	rename("data2.txt","data.txt");
	printf("文件修改完成！\a");
	Sleep(2500);
	system("cls");
	return 1;
}

void demand()
{
	char choice;
	while(1){
		while(1){
			system("cls");
			_menus();
			printf("请输入正确选项！\n");
			choice=getch();
			if(choice<'6'&&choice>'0'){
				printf("您选择的是%d选项\n",choice-'0');
				break;
			}
		}
		struct node tem[1000];
		FILE *fp;
		fp=fopen("data.txt","r");
		if(fp==NULL){
			printf("文件打开失败！\n");
			end();
			return ;
		}
		int i=0;
		while(fscanf(fp,"%s%s%s%d%s",tem[i].stnum,tem[i].stname,tem[i].sex,&tem[i].age,tem[i].detail)!=EOF){
			i++;
		}
		fclose(fp);
		int sum=i;
		char d[20];
		int c;
		int fa=1;
		switch(choice){
			case '1':
				printf("请输入学号:");
				scanf("%s",d);
				for(int i=0;i<sum;i++){
					if(strcmp(d,tem[i].stnum)==0){
						printf("学号:%s\t姓名:%s\t性别:%s\t年龄:%d\t备注:%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
						fa=0;
					}
				}
				printf("%s\a\n",fa==1?"此次查询无有效信息！":"查询结果如上！"); 
				end();
				break;
			case '2':
				printf("请输入姓名:");
				scanf("%s",d);
				for(int i=0;i<sum;i++){
					if(strcmp(d,tem[i].stname)==0){
						printf("学号:%s\t姓名:%s\t性别:%s\t年龄:%d\t备注:%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
						fa=0;
					}
				}
				printf("%s\a\n",fa==1?"此次查询无有效信息！":"查询结果如上！"); 
				end();
				break;
			case '3':
				printf("请输入性别:");
				scanf("%s",d);
				for(int i=0;i<sum;i++){
					if(strcmp(d,tem[i].sex)==0){
						printf("学号:%s\t姓名:%s\t性别:%s\t年龄:%d\t备注:%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
						fa=0;
					}
				}
				printf("%s\a\n",fa==1?"此次查询无有效信息！":"查询结果如上！"); 
				end();
				break;
			case 4:
				printf("请输入年龄:");
				scanf("%d",&c);
				for(int i=0;i<sum;i++){
					if(c==tem[i].age){
						printf("学号:%s\t姓名:%s\t性别:%s\t年龄:%d\t备注:%s\n",tem[i].stnum,tem[i].stname,tem[i].sex,tem[i].age,tem[i].detail);
						fa=0;
					}
				}
				printf("%s\a\n",fa==1?"此次查询无有效信息！":"查询结果如上！"); 
				end();
				break;
			case '5':
				return ;
		}
	}
}
void end()
{
	char c;
	printf("按任意键继续!\n"); 
	c=getch();
}

void _menus()
{
	printf("\t\t\t\t\t********选择你需要的查询********\n");
	printf("\t\t\t\t\t*--------1 按学号查询----------*\n"); 
	printf("\t\t\t\t\t*--------2 按姓名查询----------*\n"); 
	printf("\t\t\t\t\t*--------3 按性别查询----------*\n"); 
	printf("\t\t\t\t\t*--------4 按年龄查询----------*\n");
	printf("\t\t\t\t\t*--------5 退出查询------------*\n\n");  
}

void _menus2()
{
	printf("\t\t\t\t\t*********请选择修改方式*******\n");
	printf("\t\t\t\t\t*--------1 修改学号----------*\n"); 
	printf("\t\t\t\t\t*--------2 修改姓名----------*\n"); 
	printf("\t\t\t\t\t*--------3 修改性别----------*\n"); 
	printf("\t\t\t\t\t*--------4 修改年龄----------*\n");
	printf("\t\t\t\t\t*--------5 退出--------------*\n\n");  
}

int password()
{
	char mi[100];
	char mi2[100];
	char zhang2[100];
	mi2[100]='\0';
	mi[100]='\0'; 
	int fa=1;
	FILE *fp;
	fp=fopen("user.txt","r");
	if(fp==NULL){
		printf("打开文件失败!\n");
	}
	fscanf(fp,"%s",zhang2);
	fscanf(fp,"%s",mi2);
	fclose(fp);
	while(1){
		if(fa>3){
			char si;
			printf("密码错误超过三次！\n");
			printf("是否继续输入");
			printf("按Y则继续输入！\n否则退出!\n");
			si=getch();
			if(si=='Y'||si=='y'){}else return 0;
		}
		printf("请输入密码！\n");
		scanf("%s",mi);
		if(strcmp(mi,mi2)==0){
			printf("密码正确！\n");
			Sleep(1000);
			return 1;
		}else {
			printf("密码错误!\n");
			Sleep(1000);
		}
		fa++;
	}
	return 0;
}
int login()
{
	char mi[100];
	char zhang[100];
	char mi2[100];
	char zhang2[100];
	mi2[100]='\0';
	mi[100]='\0'; 
	FILE *fp;
	fp=fopen("user.txt","r");
	if(fp==NULL){
		printf("打开文件失败!\n");
		Sleep(1000);
		return 0; 
	}
	fscanf(fp,"%s",zhang2);
	fscanf(fp,"%s",mi2);
	fclose(fp);
	for(int i=0;i<3;i++){
		printf("请输入您的账号：");
		scanf("%s",zhang);
		printf("\n");
		printf("请输入您的密码：");
		scanf("%s",mi);
		printf("\n");
		if(strcmp(mi,mi2)!=0||strcmp(zhang,zhang2)!=0){
			system("cls");
			printf("账号或密码输入错误！\n请重新输入！\n你还有%d次机会\n",3-i-1);
			if(3-i-1==0){
				printf("本次使用到此结束！\n");
				printf("按任意键退出!\n"); 
				getchar();
				getchar();
				return 0;
			}
		}else{
			printf("欢迎使用本系统！\n");
			end();
			system("cls");
			return 1; 
		}
	}
	end(); 
	return 0;
}

int cpassword()
{
	char mi[100];
	char zhang[100];
	char mi2[100];
	mi2[100]='\0';
	mi[100]='\0'; 
	char zhang2[100];
	if(password()!=1){
		return 0;
	}
	FILE *out;
	out=fopen("user.txt","r");
	fscanf(out,"%s",zhang2);
	fclose(out);
	while(1){
		printf("请修改您的密码！\n");
		scanf("%s",mi2);
		printf("请确认您的密码！\n");
		scanf("%s",mi);
		if(strcmp(mi,mi2)==0){
			FILE *fp;
			fp=fopen("user.txt","w+");
			fprintf(fp,"%s %s",zhang2,mi2);
			fclose(fp);
			break;
		}else {
			printf("两次密码不匹配\n请重新输入!\n");
			Sleep(1000);
			system("cls");
		}
	}
	printf("密码修改成功！\n");
	printf("请重新登陆！\n");
	Sleep(1000);
	system("cls");
	return login();
}