#include<stdio.h>
#include<string.h>
#include<stdlib.h>

void student_add();
void student_ll();
void student_xhcx();
void student_xmcx();
void student_xg();
void student_sc();
int flag=1;
int main()
{ 
	int xuanze;
	system("cls");
	loop:
	printf("\t\t\t\t**********     学生信息管理系统     **********");
	printf("\n\n\n\n");
	printf("\t\t\t\t               1.学生信息录入                 \n");
	printf("\t\t\t\t               2.学生信息浏览                 \n");
	printf("\t\t\t\t               3.学号查询系统                 \n");
	printf("\t\t\t\t               4.姓名查询系统                 \n");
	printf("\t\t\t\t               5.学生信息修改                 \n");
	printf("\t\t\t\t               6.学生信息删除                 \n");
	printf("\t\t\t\t               0.退出系统                     \n");
	printf("请你选择(0-6):                \n");
	scanf("%d",&xuanze);
	switch(xuanze)
		{
			case 0:break;
			case 1:student_add();break;
			case 2:student_ll();break;
			case 3:student_xhcx();break;
			case 4:student_xmcx();break;
			case 5:student_xg();break;
			case 6:student_sc();break;
			default:printf("你的选择有误！请重新选择！");goto loop; 
		}
		return 0;
}

typedef struct student
	{
		char xuehao[20];
	    char xingming[20];
	    char nianling[20];
	    char xingbie[20];
	    char nianyue[20];
	    char dizhi[1000];
	    char dianhua[20];
	    char email[1000];
    }stu;

void student_add()
{
    int main();
    FILE *fp;
    struct student stu;
    int n;
    scanf("%d",&n);
    system("cls");
    fp=fopen("student.txt","a+");
    if(fp==NULL)
        printf("open file error!");
    else 
    {
    	while(flag)
		{
			for(int i=1;i<=n;i++)
			{
		        printf("请依次输入该同学的学号、姓名、年龄、性别、年月、地址、电话、电子邮箱：\n");
		        scanf("%s%s%s%s%s%s%s%s",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
                fprintf(fp,"%s %s %s %s %s %s %s %s\n",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
				printf(" press '1'to continue,'0' exit:");
		        scanf("%d",&flag);
		    }
	   }
    }
    fclose(fp);
    main();
}
void student_ll()
{
	char a[50],b[50],c[50],d[50],e[50],f[50],g[50],h[50];
	system("cls");
freopen("student.txt","r",stdin);
printf("学号   姓名  年龄  性别  年月  地址  电话  电子邮箱\n");
while(scanf("%s%s%s%s%s%s%s%s",a,b,c,d,e,f,g,h)!=EOF)
{
	printf("%s    %s    %s    %s    %s    %s    %s    %s\n",a,b,c,d,e,f,g,h);
 } 
 return ;
}
void student_xhcx()
{
	FILE *fp;
	struct student stu;
	char xh[20];
	system("cls");
	printf("输入你想要查询的同学学号：\n");
	scanf("%s",xh);
	fp=fopen("student.txt","r");
    if(fp==NULL)
        printf("open file error!");
	else
	{
		for(;!feof(fp);)
		{
			fscanf(fp,"%s%s%s%s%s%s%s%s",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
		    if(strcmp(xh,stu.xuehao)==0)
		    {
			    printf("以下是该同学的信息：\n");
	            printf("%s %s %s     %s    %s   %s  %s %s\n",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
	        }
	        if(strcmp(xh,stu.xuehao)!=0)
		    printf("没有你想要查看的同学的任何信息!请重新运行程序!\n");break;
	    }
	} 
	fclose(fp);
}
void student_xmcx()
{
	FILE *fp;
	struct student stu;
	char xm[40];
	system("cls");
	printf("输入你想要查询的同学姓名：\n");
	scanf("%s",xm);
	fp=fopen("student.txt","r");
    if(fp==NULL)
        printf("open file error!");
	else 
	{
		for(;!feof(fp);)
		{
			fscanf(fp,"%s%s%s%s%s%s%s%s",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
		    if(strcmp(xm,stu.xingming)==0)
		    {
			    printf("以下是该同学的信息：\n");
	            printf("%s %s %s     %s    %s   %s  %s %s\n",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email);
	        }
	        if(strcmp(xm,stu.xingming)!=0)
		    printf("没有你想要查看的同学的任何信息!请重新运行程序!\n");break;
	    } 
	}
	fclose(fp);
}
void student_xg()
{struct student stu;
	char xh[50],s[100],buf[100][50];
	memset(buf,0,sizeof(buf));
		printf("输入你想要修改的同学学号：\n");
		scanf("%s",xh);int ok=0;
		int cout,len=strlen(xh),i,p=0;
		freopen("student.txt","r",stdin);
		while(gets(s))
		{cout=0;
			for(i=0;i<strlen(xh);i++)
			{
				if(xh[i]==s[i])cout++;
			}
			if(cout==len){ok=1;break;}
		}
		freopen("CON","r",stdin); 
		freopen("CON","w",stdout);
		if(ok)
		{
			char f[100];int op;
			printf("输入你想修改的选项:1.地址 2.电话 3.电子邮箱\n");
			scanf("%d",&op);
			printf("输入你想修改的内容：\n");
			scanf("%s",f);
				freopen("student.txt","r",stdin);
			while(scanf("%s%s%s%s%s%s%s%s\n",stu.xuehao,stu.xingming,stu.nianling,stu.xingbie,stu.nianyue,stu.dizhi,stu.dianhua,stu.email)!=EOF)
			{
				if(strcmp(stu.xuehao,xh)==0)//找到这个学生了 
				{
					if(op==1)
					{
						strcpy(stu.dizhi,f);
						 
					}
					else if(op==2)
					{
						strcpy(stu.dianhua,f);
					}
					else if(op==3)
					{
						strcpy(stu.email,f);
					
					}
					strcat(buf[p],stu.xuehao);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.xingming);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.nianling);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.xingbie);buf[p][strlen(buf[p])]=' ';	
				    strcat(buf[p],stu.nianyue);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.dizhi);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.dianhua);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.email);buf[p][strlen(buf[p])]=' ';
				    p++;
				}
				else
				{
					strcat(buf[p],stu.xuehao);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.xingming);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.nianling);buf[p][strlen(buf[p])]=' ';
					strcat(buf[p],stu.xingbie);buf[p][strlen(buf[p])]=' ';	
				    strcat(buf[p],stu.nianyue);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.dizhi);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.dianhua);buf[p][strlen(buf[p])]=' ';
				    strcat(buf[p],stu.email);buf[p][strlen(buf[p])]=' ';
				    p++;	
				}
			}
			freopen("student.txt","w",stdout);
			for(i=0;i<p;i++)
			{
				printf("%s\n",buf[i]);
			}
			freopen("CON","r",stdin); 
			freopen("CON","w",stdout);
		}
		else printf("没有找到该学生信息！\n");
}
void student_sc()
{
	char s[100],a[100],b[300],buf[30][100];
printf("你要删除的学生学号：\n");
scanf("%s",s);
memset(buf,0,sizeof(buf));
freopen("student.txt","r",stdin);
int i=0,j;
while(scanf("%s",a)!=EOF) 
{

	gets(b);
	if(strcmp(s,a)!=0)
	{strcat(buf[i],a);
	strcat(buf[i++],b);}
}
freopen("student.txt","w",stdout);
for(j=0;j<i;j++)
{
	printf("%s\n",buf[j]);
}
freopen("CON","r",stdin); 
freopen("CON","w",stdout);
}