diff --git a/周一展示代码2.0 (1) (4).c b/周一展示代码2.0 (1) (4).c
new file mode 100644
index 0000000..2214d4c
--- /dev/null
+++ b/周一展示代码2.0 (1) (4).c	
@@ -0,0 +1,881 @@
+#include <stdio.h>
+#include <windows.h>
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <mmsystem.h>
+#include <math.h>
+#pragma comment(lib,"winmm.lib")
+#define MAX 1000
+#define NAME_MAX 20
+#define SEX_MAX 5
+#define ADDR_MAX 30
+#define TELE_MAX 12
+#define S_NUM 13
+
+
+#define BLACK   0
+#define BLUE    1
+#define GREEN   2
+#define CYAN    3
+#define RED     4
+#define MAGENTA 5
+#define BROWN   6
+#define LIGHTGRAY   7
+#define DARKGRAY   8
+#define LIGHTBLUE  9
+#define LIGHTGREEN 10
+#define LIGHTCYAN  11
+#define LIGHTRED   12
+#define LIGHTMAGENTA 13
+#define YELLOW      14
+#define WHITE       15
+
+
+#define T double
+#define _CRT_SECURE_NO_WARNINGS 1
+#include <io.h>
+#include <time.h>
+#define error(message) { printf(message "\n"); fflush(stdout); system("pause"); exit(-1); }
+
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
+#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x4
+#endif
+
+#define MID_FILE_PATH "001.mp3"
+#define LYRIC_FILE_PATH "lyric.lrc"
+#define PIC1_PATH "pic1.bmp"
+#define PIC2_PATH "pic2.bmp"
+
+
+
+#pragma pack(1)
+/*
+
+CYAN����ɫ
+MAGENTA: Ʒ��ɫ
+LIGHTGRAY: dz��ɫ
+
+*/
+
+T c(T x,T y,T r)
+{
+	return sqrt(x*x+y*y)-r;
+}
+T u(T x,T y,T t)
+{
+	return x*cos(t)+y*sin(t);
+}
+T v(T x,T y,T t)
+{
+	return y*cos(t)-x*sin(t);
+}
+T fa(T x,T y)
+{
+	return fmin(c(x,y,0.5),c(x*0.47+0.15,y+0.25,0.3));
+}
+T no(T x,T y)
+{
+	return c(x*1.2+0.97,y+0.25,0.2);
+}
+T nh(T x,T y)
+{
+	return fmin(c(x+0.9,y+0.25,0.03),c(x+0.75,y+0.25,0.03));
+}
+T ea(T x,T y)
+{
+	return fmin(c(x*1.7+0.3,y+0.7,0.15),c(u(x,y,0.25)*1.7,v(x,y,0.25)+0.65,0.15));
+}
+T ey(T x,T y)
+{
+	return fmin(c(x+0.4,y+0.35,0.1),c(x+0.15,y+0.35,0.1));
+}
+T pu(T x,T y)
+{
+	return fmin(c(x+0.38,y+0.33,0.03),c(x+0.13,y+0.33,0.03));
+}
+T fr(T x,T y)
+{
+	return c(x*1.1-0.3,y+0.1,0.15);
+}
+T mo(T x,T y)
+{
+	return fmax(c(x+0.15,y-0.05,0.2),-c(x+0.15,y,0.25));
+}
+T o(T x,T y,T(*f)
+(T,T),T i)
+{
+	T r=f(x,y);return fabs(r)<0.02?(atan2(f(x,y+1e-3)-r,f(x+1e-3,y)-r)+0.3)*1.273+6.5:r<0?i:0;
+}
+T s(T x,T y,T(*f)(T,T),T i)
+{
+	return f(x,y)<0?i:0;
+}
+T f(T x,T y)
+{
+	return o(x,y,no,1)?fmax(o(x,y,no,1),s(x,y,nh,12)):fmax(o(x,y,fa,1),fmax(o(x,y,ey,11),fmax(o(x,y,ea,1),fmax(o(x,y,mo,1),fmax(s(x,y,fr,13),s(x,y,pu,12))))));
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+typedef union {
+    char user_name[20];
+    char user_password[20];
+} User;
+
+// �������Ա��ͬ�壬��ʹ�������ƣ��ɰ�����չ�����Ա
+typedef union {
+    char admin_name[20];
+    char admin_password[20];
+} Administrator;
+
+// ����һ���ṹ����������ͬ�壬���������û����͵ȸ�����������������������Ȩ�ޱ�ʶ���ֶΣ�
+typedef struct {
+    int user_type;  // 0��ʾʹ���ߣ�1��ʾ����Ա���ɸ���ʵ����չ��������
+    union {
+        User user;
+        Administrator admin;
+    } info;
+} Person;
+const char ADMIN_NAME[] = "a";
+const char ADMIN_PASSWORD[] = "1";
+
+// ��ģ����ͨʹ�����û��������룬ʵ�ʿɴ��ļ��ȶ�ȡ��֤
+const char USER_NAME[] = "u";
+const char USER_PASSWORD[] = "6";
+
+
+
+//��Ա��Ϣ
+typedef struct ContactMember
+{
+	char Name[NAME_MAX];
+	char Sex[SEX_MAX];
+	int Age;
+	char Number[TELE_MAX];
+	char Address[ADDR_MAX];
+	int Snumber;
+}ContactMember;
+
+typedef struct Contact
+{
+	ContactMember ContactMembers[MAX];
+	int sz;
+}Contact;
+
+//������ɫ
+void SetColor(int ForgC, int BackC) {
+    WORD wColor;
+    HANDLE hStdOut;
+
+    hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
+    wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);
+    SetConsoleTextAttribute(hStdOut, wColor);
+}
+
+
+//��ʼ��ͨѶ¼
+void InitContact(Contact* con);
+
+//������ϵ����Ϣ���ӵ��ļ�ĩβ
+void AddContactToFile(ContactMember newContact, const char* filename);
+
+// ɾ��ָ����ϵ�ˣ�ͨ������ƥ��ɾ����
+void DeleteContact(Contact* con);
+
+// ��ͨѶ¼�ṹ���е���ϵ����Ϣд�ص��ļ���
+void WriteContactToFile(Contact* con, const char* filename);
+
+//����ָ����ϵ��
+void SearchContact(Contact* con);
+
+// �޸���ϵ�˹��ܺ���
+void ModifyContact(Contact* con, const char* filename);
+
+// ���ļ���ȡ��ϵ����Ϣ��ͨѶ¼�ṹ����
+void ReadContactFromFile(Contact* con, const char* filename);
+
+// ������ϵ����Ϣ���ӵ��ļ�ĩβ
+void AddContactToFile(ContactMember newContact, const char* filename);
+
+// չʾ��ϵ����Ϣ
+void ReadContact(Contact* con);
+
+// ���������ϵ�ˣ����ڴ�����գ�ͬʱ���������д���ļ�����ļ����ݣ�
+void ClearContacts(Contact* con, const char* filename);
+
+//��������������������ϵ��
+void SortContacts1(Contact* con);
+
+//��ѧ����������������ϵ��
+void SortContactsBySnumber1(Contact* con);
+
+//��������������������ϵ��
+void SortContacts2(Contact* con);
+
+//��ѧ�Ž�������������ϵ��
+void SortContactsBySnumber2(Contact* con);
+
+// ��¼��֤����������ֵ��ʾ�û����ͣ�0Ϊʹ���ߣ�1Ϊ����Ա��-1��ʾ��¼ʧ��
+int login(Person *p);
+//����һ���ļ�
+void loadContacts(Contact* con);
+//��������
+void saveContacts(Contact* con);
+
+void welcome()
+{
+    printf("*********************************\n");
+    printf("********��ӭʹ��ͨѶ¼ϵͳ*******\n");
+    printf("*********************************\n");
+    printf("Q 1 ����!\n");
+    printf("1----Yes                  2----No\n");
+}
+
+
+
+void menu()
+{
+	printf("***************************************\n");
+	printf("******       ͨѶ¼      **************\n");
+	printf("******  1.����   2.ɾ��  **************\n");
+	printf("******  3.����   4.�޸�  **************\n");
+	printf("******  5.����   6.���  **************\n");
+	printf("******  7.����   8.����������ɫ  ******\n");
+	printf("*****************0.�˳�****************\n");
+	printf("***************************************\n");
+}
+
+
+void yanse()
+{
+    printf("0----black               1----blue\n");
+    printf("2----green               3----cyan\n");
+    printf("4----red                 5----magenta\n");
+    printf("6----brown               7----lightgray\n");
+    printf("8----darkgray            9----lightblue\n");
+    printf("10----lightgreen         11----lightcyan\n");
+    printf("12----lightred           13----lightmagenta\n");
+    printf("14----yellow\n");
+}
+
+
+
+// ����Windows��API����mid��Ƶ (ps: ���API��������mp3����Ҳ�ǿ��Ե�~)
+BOOLEAN playMusic(const char* filePath) {
+    HMODULE module = LoadLibraryA("winmm.dll");
+
+    typedef MCIERROR(WINAPI* MciSendStringT)(LPCSTR lpstrCommand, LPSTR lpstrReturnString, UINT uReturnLength, HWND hwndCallback);
+
+    MciSendStringT func_mciSendStringA = (MciSendStringT)GetProcAddress(module, "mciSendStringA");
+    if (func_mciSendStringA == NULL)
+        return FALSE;
+
+    char buff[255], command[100];
+
+    sprintf_s(command, 100, "open %s alias playsound_134", filePath);
+    func_mciSendStringA(command, buff, 254, NULL);
+
+    sprintf_s(command, 100, "set playsound_134 time format milliseconds");
+    func_mciSendStringA(command, buff, 254, NULL);
+
+    sprintf_s(command, 100, "status playsound_134 length");
+    func_mciSendStringA(command, buff, 254, NULL);
+
+    sprintf_s(command, 100, "play playsound_134 from 0 to %s", buff);
+    func_mciSendStringA(command, buff, 254, NULL);
+
+    return TRUE;
+}
+
+
+
+
+
+
+
+int main(int a,char**b)
+{
+
+
+   for(T y=-1,s=a>1?strtod(b[1],0):1;
+		y<0.6;y+=0.05/s,putchar('\n'))
+	for(T x=-1;x<0.6;x+=0.025/s)
+		putchar(" .|/=\\|/=\\| @!"[(int)f(u(x,y,0.3),v(x,y,0.3))]);
+
+
+
+
+
+ printf("\nʲô��ɫ���ֺÿ��أ�\n");
+ yanse();
+ int ys;
+ scanf("%d",&ys);
+ if(0==ys) SetColor(BLACK, WHITE);
+ else if(1==ys) SetColor(BLUE, WHITE);
+ else if(2==ys) SetColor(GREEN, WHITE);
+ else if(3==ys) SetColor(CYAN, WHITE);
+ else if(4==ys) SetColor(RED, WHITE);
+ else if(5==ys) SetColor(MAGENTA, WHITE);
+ else if(6==ys) SetColor(BROWN, WHITE);
+ else if(7==ys) SetColor(LIGHTGRAY, WHITE);
+ else if(8==ys) SetColor(DARKGRAY, WHITE);
+ else if(9==ys) SetColor(LIGHTBLUE, WHITE);
+ else if(10==ys) SetColor(LIGHTGREEN, WHITE);
+ else if(11==ys) SetColor(LIGHTCYAN, WHITE);
+ else if(12==ys) SetColor(LIGHTRED, WHITE);
+ else if(13==ys) SetColor(LIGHTMAGENTA, WHITE);
+ else if(14==ys) SetColor(YELLOW, BLACK);
+ else printf("���벻�Ϸ����޷�����������ɫ��\n");
+    // ����������ɫ
+
+
+
+    int s,z,choice;
+    welcome();
+    scanf("%d",&z);
+
+
+
+
+
+
+
+
+
+
+    if(1==z){
+	Contact con;
+    const char* filename = "contacts.txt";  // �����ļ�����contacts.txt���ɰ����޸�
+	InitContact(&con);
+	Person person;
+	int login_result=login(&person);
+	if(login_result==-1){
+        printf("��¼ʧ�ܣ������û��������룡\n");
+        return 0;
+	}
+	//��������
+	playMusic(MID_FILE_PATH);
+    system("pause");
+
+	do
+	{
+		menu();
+		scanf("%d", &s);
+		switch (s)
+		{
+		case 1:
+		    if(person.user_type==1){
+            ContactMember newContact;
+            char Name[NAME_MAX];
+            char Sex[SEX_MAX];
+            int Age;
+            char Number[TELE_MAX];
+            char Address[ADDR_MAX];
+            int Snumber;
+            printf("����������ϵ��������");
+            scanf("%s",Name);
+            printf("����������ϵ���Ա�");
+            scanf("%s",Sex);
+            printf("����������ϵ�����䣺");
+            scanf("%d",&Age);
+            printf("����������ϵ�˵绰���룺");
+            scanf("%s",Number);
+            printf("����������ϵ�˵�ַ��");
+            scanf("%s",Address);
+            printf("����������ϵ��ѧ�ţ� ");
+            scanf("%d",&Snumber);
+            strcpy(newContact.Name, Name);
+            strcpy(newContact.Sex, Sex);
+            newContact.Age = Age;
+            strcpy(newContact.Address, Address);
+            strcpy(newContact.Number, Number);
+            newContact.Snumber=Snumber;
+            AddContactToFile(newContact, filename);
+            // �ٴδ��ļ���ȡ��ϵ����Ϣ���ɿ���������������
+            ReadContactFromFile(&con, filename);
+            ReadContact(&con);
+            }
+
+			else
+                printf("ʹ�����޴�Ȩ�ޣ�\n");
+			break;
+		case 2:if(person.user_type==1){
+			 DeleteContact(&con);
+			 WriteContactToFile(&con, "contacts.txt");
+			 }
+			else
+                printf("ʹ�����޴�Ȩ�ޣ�\n");
+			break;
+		case 3:if(person.user_type==1)
+			SearchContact(&con);
+			else
+                printf("ʹ�����޴�Ȩ�ޣ�\n");
+			break;
+		case 4:if(person.user_type==1){
+			ModifyContact(&con, "contacts.txt");
+			ReadContact(&con);
+			}
+			else
+                printf("ʹ�����޴�Ȩ�ޣ�\n");
+			break;
+		case 5:
+			// ���ļ���ȡ��ϵ����Ϣ
+        ReadContactFromFile(&con, filename);
+
+    // չʾ��ϵ����Ϣ
+        ReadContact(&con);
+			break;
+		case 6:if(person.user_type==1)
+			ClearContacts(&con, "contacts.txt");
+			else
+                printf("ʹ�����޴�Ȩ�ޣ�\n");
+			break;
+		case 7:
+		    printf("����ʽ��\n1������ѧ����������\n2������������������\n3������ѧ�Ž�������\n4������������������\n");
+		    printf("��ѡ������ʽ��\n");
+		    scanf("%d",&choice);
+		    if(choice==1)
+                SortContactsBySnumber1(&con);
+            else if(choice==2)
+			SortContacts1(&con);
+			else if(choice==3)
+                SortContactsBySnumber2(&con);
+            else if(choice==4)
+			SortContacts2(&con);
+			else
+                printf("��������ȷ��ѡ��");
+			break;
+			case 8:printf("��ѡ��ϲ����������ɫ��\n");
+             yanse();
+             scanf("%d",&ys);
+             if(0==ys) SetColor(BLACK, WHITE);
+             else if(1==ys) SetColor(BLUE, WHITE);
+             else if(2==ys) SetColor(GREEN, WHITE);
+             else if(3==ys) SetColor(CYAN, WHITE);
+             else if(4==ys) SetColor(RED, WHITE);
+             else if(5==ys) SetColor(MAGENTA, WHITE);
+             else if(6==ys) SetColor(BROWN, WHITE);
+             else if(7==ys) SetColor(LIGHTGRAY, WHITE);
+             else if(8==ys) SetColor(DARKGRAY, WHITE);
+             else if(9==ys) SetColor(LIGHTBLUE, WHITE);
+             else if(10==ys) SetColor(LIGHTGREEN, WHITE);
+             else if(11==ys) SetColor(LIGHTCYAN, WHITE);
+             else if(12==ys) SetColor(LIGHTRED, WHITE);
+             else if(13==ys) SetColor(LIGHTMAGENTA, WHITE);
+             else if(14==ys) SetColor(YELLOW, BLACK);
+             else printf("���벻�Ϸ����޷�����������ɫ��");
+             break;
+		case 0:
+		    saveContacts(&con);
+			printf("�ѳɹ��˳���\n");
+			exit(0);
+			break;
+		default:
+			printf("��������ȷ��ѡ�\n");
+		}
+	} while (s);
+	loadContacts(&con);
+	}
+	else printf("��ӭ�´�ʹ�ã�\n");
+
+
+	return 0;
+}
+
+//��ʼ����Ա��Ϣ
+void InitContact(Contact* con)
+{
+	con->sz = 0;
+	memset(con, 0, sizeof(con));
+}
+
+//����Ŀ���Աλ��
+int FindName(Contact* con, char* name)
+{
+	int i=0;
+	for (i = 0; i < con->sz; i++)
+	{
+		if (strcmp(con->ContactMembers[i].Name, name) == 0)
+		{
+			return i;
+		}
+	}
+	return -1;
+}
+
+//��С����(qsortʵ��)
+int Sort(const void* a, const void* b)
+{
+	ContactMember* A = (ContactMember*)a;
+	ContactMember* B = (ContactMember*)b;
+	return memcmp(B, A, sizeof(ContactMember));
+}
+
+void AddContactToFile(ContactMember newContact, const char* filename)
+{
+    FILE* pf = fopen(filename, "a");
+    if (pf == NULL)
+    {
+        perror("Open file for append failed");
+        return;
+    }
+    fprintf(pf, "%s %s %d %s %s %d\n", newContact.Name, newContact.Sex,
+        newContact.Age, newContact.Address, newContact.Number, newContact.Snumber);
+    fclose(pf);
+}
+
+void DeleteContact(Contact* con)
+{
+    char name[NAME_MAX];
+    printf("������Ҫɾ������ϵ��������");
+    scanf("%s", name);
+    int i, j;
+    for (i = 0; i < con->sz; i++)
+    {
+        if (strcmp(con->ContactMembers[i].Name, name) == 0)
+        {
+            // �ҵ��󽫺����Ԫ��������ǰ�Ƹ���Ҫɾ����Ԫ��
+            for (j = i; j < con->sz - 1; j++)
+            {
+                strcpy(con->ContactMembers[j].Name, con->ContactMembers[j + 1].Name);
+                strcpy(con->ContactMembers[j].Sex, con->ContactMembers[j + 1].Sex);
+                con->ContactMembers[j].Age = con->ContactMembers[j + 1].Age;
+                strcpy(con->ContactMembers[j].Address, con->ContactMembers[j + 1].Address);
+                strcpy(con->ContactMembers[j].Number, con->ContactMembers[j + 1].Number);
+                con->ContactMembers[j].Snumber=con->ContactMembers[j + 1].Snumber;
+            }
+            con->sz--;
+            printf("��ϵ��ɾ���ɹ���\n");
+            return;
+        }
+    }
+    printf("δ�ҵ�����ϵ�ˣ��޷�ɾ����\n");
+}
+
+void WriteContactToFile(Contact* con, const char* filename)
+{
+    assert(con);
+    assert(filename);
+    int i=0;
+    FILE* pf = fopen(filename, "w");
+    if (pf == NULL)
+    {
+        perror("Open file failed");
+        return;
+    }
+    for (i = 0; i < con->sz; i++)
+    {
+        fprintf(pf, "%s %s %d %s %s %d\n", con->ContactMembers[i].Name,
+            con->ContactMembers[i].Sex,
+            con->ContactMembers[i].Age,
+            con->ContactMembers[i].Address,
+            con->ContactMembers[i].Number,
+            con->ContactMembers[i].Snumber);
+    }
+    fclose(pf);
+}
+
+void SearchContact(Contact* con)
+{
+	assert(con);
+	char name[NAME_MAX];
+	printf("������Ҫ��ѯ���ˣ�");
+	scanf("%s", name);
+	int ret = FindName(con, name);
+	if (ret == -1)
+	{
+		printf("��ѯĿ�겻���ڣ�\n");
+		return;
+	}
+	printf("%-20s\t%-5s\t%s\t%-30s\t%-12s\t%-12s\n", "����", "�Ա�", "����", "��ַ", "����", "ѧ��");
+	printf("%-20s\t%-5s\t%d\t%-30s\t%-12s\t%-12d\n", con->ContactMembers[ret].Name,
+		con->ContactMembers[ret].Sex,
+		con->ContactMembers[ret].Age,
+		con->ContactMembers[ret].Address,
+		con->ContactMembers[ret].Number,
+		con->ContactMembers[ret].Snumber);
+
+}
+
+void ModifyContact(Contact* con, const char* filename)
+{
+    char name[NAME_MAX];
+    printf("������Ҫ�޸ĵ���ϵ��������");
+    scanf("%s", name);
+    getchar();  // �������뻺���������ַ�
+    int i;
+    for (i = 0; i < con->sz; i++)
+    {
+        if (strcmp(con->ContactMembers[i].Name, name) == 0)
+        {
+            printf("�������µ��Ա�");
+            fgets(con->ContactMembers[i].Sex, 5, stdin);
+            // ȥ��fgets�����ַ���ĩβ�Ļ��з�
+            if (con->ContactMembers[i].Sex[strlen(con->ContactMembers[i].Sex) - 1] == '\n')
+            {
+                con->ContactMembers[i].Sex[strlen(con->ContactMembers[i].Sex) - 1] = '\0';
+            }
+
+            printf("�������µ����䣺");
+            scanf("%d", &con->ContactMembers[i].Age);
+            getchar();  // �������뻺���������ַ�
+            printf("�������µĵ�ַ��");
+            fgets(con->ContactMembers[i].Address, ADDR_MAX, stdin);
+            if (con->ContactMembers[i].Address[strlen(con->ContactMembers[i].Address) - 1] == '\n')
+            {
+                con->ContactMembers[i].Address[strlen(con->ContactMembers[i].Address) - 1] = '\0';
+            }
+
+            printf("�������µĺ��룺");
+            fgets(con->ContactMembers[i].Number, TELE_MAX, stdin);
+            if (con->ContactMembers[i].Number[strlen(con->ContactMembers[i].Number) - 1] == '\n')
+            {
+                con->ContactMembers[i].Number[strlen(con->ContactMembers[i].Number) - 1] = '\0';
+            }
+
+            printf("�������µ�ѧ�ţ�");
+            scanf("%d", &con->ContactMembers[i].Snumber);
+			getchar();  // �������뻺���������ַ�
+
+            printf("��ϵ����Ϣ�޸ijɹ���\n");
+            WriteContactToFile(con, filename);  // ���޸ĺ����Ϣд���ļ�
+            return;
+        }
+    }
+    printf("δ�ҵ�����ϵ�ˣ��޷��޸ģ�\n");
+}
+
+void ReadContactFromFile(Contact* con, const char* filename)
+{
+    assert(con);
+    assert(filename);
+    FILE* pf = fopen(filename, "r");
+    if (pf == NULL)
+    {
+        perror("Open file failed");
+        return;
+    }
+    con->sz = 0;
+    while (!feof(pf))
+    {
+        if (fscanf(pf, "%s %s %d %s %s %d", con->ContactMembers[con->sz].Name,
+            con->ContactMembers[con->sz].Sex,
+            &(con->ContactMembers[con->sz].Age),
+            con->ContactMembers[con->sz].Address,
+            con->ContactMembers[con->sz].Number,
+            &(con->ContactMembers[con->sz].Snumber)) == 6)
+        {
+            con->sz++;
+        }
+    }
+    fclose(pf);
+}
+
+void ReadContact(Contact* con)
+{
+	int i=0;
+    assert(con);
+    printf("%-20s\t%-5s\t%s\t%-30s\t%-12s\t%-12s\n", "����", "�Ա�", "����", "��ַ", "����", "ѧ��");
+    for (i = 0; i < con->sz; i++)
+    {
+        printf("%-20s\t%-5s\t%d\t%-30s\t%-12s\t%-12d\n", con->ContactMembers[i].Name,
+            con->ContactMembers[i].Sex,
+            con->ContactMembers[i].Age,
+            con->ContactMembers[i].Address,
+            con->ContactMembers[i].Number,
+            con->ContactMembers[i].Snumber);
+
+    }
+}
+
+void ClearContacts(Contact* con, const char* filename)
+{
+    con->sz = 0;  // ��ͨѶ¼����Ч��ϵ��������Ϊ0
+    FILE* pf = fopen(filename, "w");  // ��д�뷽ʽ���ļ��������ԭ������
+    if (pf == NULL)
+    {
+        perror("Open file failed");
+        return;
+    }
+    fclose(pf);
+    printf("��ϵ����ȫ����գ�\n");
+}
+
+void SortContacts1(Contact* con)
+{
+	int i = 0;
+	int j = 0;
+    for (i = 0; i < con->sz - 1; i++)
+    {
+        for (j = 0; j < con->sz - i - 1; j++)
+        {
+            if (strcmp(con->ContactMembers[j].Name, con->ContactMembers[j + 1].Name) > 0)
+            {
+                // ����������ϵ�˽ṹ������г�Ա��Ϣ
+                ContactMember temp = con->ContactMembers[j];
+                con->ContactMembers[j] = con->ContactMembers[j + 1];
+                con->ContactMembers[j + 1] = temp;
+            }
+        }
+    }
+    // ���������д���ļ��������ļ�����ϵ����ϢҲ��������״̬
+    const char* filename = "contacts.txt";
+    WriteContactToFile(con, filename);
+	printf("������ɣ�\n");
+}
+
+void SortContactsBySnumber1(Contact* con)
+{
+	int i=0,j=0;
+    for ( i = 0; i < con->sz - 1; i++)
+    {
+        for (j = 0; j < con->sz - i - 1; j++)
+        {
+            if (con->ContactMembers[j].Snumber>con->ContactMembers[j + 1].Snumber)
+            {
+                // ����������ϵ�˽ṹ������г�Ա��Ϣ
+                ContactMember temp = con->ContactMembers[j];
+                con->ContactMembers[j] = con->ContactMembers[j + 1];
+                con->ContactMembers[j + 1] = temp;
+            }
+        }
+    }
+    // ���������д���ļ��������ļ�����ϵ����ϢҲ��������״̬
+    const char* filename = "contacts.txt";
+    WriteContactToFile(con, filename);
+		printf("������ɣ�\n");
+}
+
+void SortContacts2(Contact* con)
+{
+	int i = 0;
+	int j = 0;
+    for (i = 0; i < con->sz - 1; i++)
+    {
+        for (j = 0; j < con->sz - i - 1; j++)
+        {
+            if (strcmp(con->ContactMembers[j].Name, con->ContactMembers[j + 1].Name) < 0)
+            {
+                // ����������ϵ�˽ṹ������г�Ա��Ϣ
+                ContactMember temp = con->ContactMembers[j];
+                con->ContactMembers[j] = con->ContactMembers[j + 1];
+                con->ContactMembers[j + 1] = temp;
+            }
+        }
+    }
+    // ���������д���ļ��������ļ�����ϵ����ϢҲ��������״̬
+    const char* filename = "contacts.txt";
+    WriteContactToFile(con, filename);
+	printf("������ɣ�\n");
+}
+
+void SortContactsBySnumber2(Contact* con)
+{
+	int i=0,j=0;
+    for ( i = 0; i < con->sz - 1; i++)
+    {
+        for (j = 0; j < con->sz - i - 1; j++)
+        {
+            if (con->ContactMembers[j].Snumber<con->ContactMembers[j + 1].Snumber)
+            {
+                // ����������ϵ�˽ṹ������г�Ա��Ϣ
+                ContactMember temp = con->ContactMembers[j];
+                con->ContactMembers[j] = con->ContactMembers[j + 1];
+                con->ContactMembers[j + 1] = temp;
+            }
+        }
+    }
+    // ���������д���ļ��������ļ�����ϵ����ϢҲ��������״̬
+    const char* filename = "contacts.txt";
+    WriteContactToFile(con, filename);
+		printf("������ɣ�\n");
+}
+
+int login(Person *p) {
+    char input_name[20];
+    char input_password[20];
+    printf("�������û���: ");
+    scanf("%s", input_name);
+    printf("����������: ");
+    scanf("%s", input_password);
+
+    if (strcmp(input_name, ADMIN_NAME) == 0 && strcmp(input_password, ADMIN_PASSWORD) == 0) {
+        p->user_type = 1;
+        strcpy(p->info.admin.admin_name, ADMIN_NAME);
+        strcpy(p->info.admin.admin_password, ADMIN_PASSWORD);
+        return 1;
+    } else if (strcmp(input_name, USER_NAME) == 0 && strcmp(input_password, USER_PASSWORD) == 0) {
+        p->user_type = 0;
+        strcpy(p->info.user.user_name, USER_NAME);
+        strcpy(p->info.user.user_password, USER_PASSWORD);
+        return 0;
+    }
+    return -1;
+}
+void loadContacts(Contact* con)
+{
+    FILE *file; // ����һ��FILEָ�룬����ָ���ļ�
+
+    // ���ļ���"r"��ʾ��ֻ����ʽ��
+    file = fopen("contacts.txt", "r");
+    int i=0;
+    if (file == NULL) {
+        // ����ļ���ʧ�ܣ���ӡ������Ϣ���˳�����
+        perror("Error opening file");
+        return ;
+    }
+    for (i = 0; i < con->sz; i++)
+	{
+		fscanf(file,"%-20s\t%-5s\t%d\t%-30s\t%-12s\t%-12d\n", con->ContactMembers[i].Name,
+			con->ContactMembers[i].Sex,
+			con->ContactMembers[i].Age,
+			con->ContactMembers[i].Address,
+			con->ContactMembers[i].Number,
+			con->ContactMembers[i].Snumber);
+	}
+	fclose(file);
+}
+void saveContacts(Contact* con)
+{
+    FILE *file; // ����һ��FILEָ�룬����ָ���ļ�
+
+    // ���ļ���"w"��ʾ��ֻд��ʽ��
+    file = fopen("contacts.txt", "w");
+    if (file == NULL) {
+        // ����ļ���ʧ�ܣ���ӡ������Ϣ���˳�����
+        perror("Error opening file");
+        return ;
+    }
+    int i = 0;
+    for (i = 0; i < con->sz; i++)
+	{
+		fprintf(file,"%-20s\t%-5s\t%d\t%-30s\t%-12s\t%-12d\n", con->ContactMembers[i].Name,
+			con->ContactMembers[i].Sex,
+			con->ContactMembers[i].Age,
+			con->ContactMembers[i].Address,
+			con->ContactMembers[i].Number,
+			con->ContactMembers[i].Snumber);
+	}
+	fclose(file);
+}