diff --git a/code/practise/09 函数/01 判定素数/main.c b/code/practise/09 函数/01 判定素数/main.c
new file mode 100644
index 0000000..65cf678
--- /dev/null
+++ b/code/practise/09 函数/01 判定素数/main.c	
@@ -0,0 +1,33 @@
+#include<stdio.h>
+#include<stdbool.h>
+
+bool is_prime(int n) {
+
+	int divisor;
+
+	if (n <= 1)
+		return false;
+
+	for (divisor = 2; divisor * divisor <= n; divisor++) {
+		if (n % divisor == 0)
+			return false;
+	}
+
+	return true;
+}
+
+
+int main(void) {
+
+	int n;
+	
+	printf("Enter a number: ");
+	scanf("%d", &n);
+
+	if (is_prime(n))
+		printf("Prime\n");
+	else
+		printf("Not Prime\n");
+
+	return 0;
+}
diff --git a/code/practise/09 函数/01 判定素数/readme.md b/code/practise/09 函数/01 判定素数/readme.md
new file mode 100644
index 0000000..d1aa036
--- /dev/null
+++ b/code/practise/09 函数/01 判定素数/readme.md	
@@ -0,0 +1,10 @@
+#### 程序：判断素数
+
+编写程序提示用户录入数，然后给出一条信息说明此数是否为素数。
+
+```c
+Enter a number: 24
+Not prime
+```
+
+把判断素数的实现写到另外一个函数中，此函数返回值为 true 就表示是素数，返回 false 表示不是素数。
\ No newline at end of file
diff --git a/code/practise/10 程序结构/01 猜数/global_variable.c b/code/practise/10 程序结构/01 猜数/global_variable.c
new file mode 100644
index 0000000..fbeb193
--- /dev/null
+++ b/code/practise/10 程序结构/01 猜数/global_variable.c	
@@ -0,0 +1,74 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<time.h>
+
+#define MAX_NUMBER 100
+
+int secret_number;// Ҫ�µ���
+
+void generate_secret_number();// ���������
+void read_guesses(); // �µ�ʵ��
+
+int main(void) {
+
+	char command;
+
+	printf("Guess the secret number between 1 and 100.\n");
+	
+	do {
+		generate_secret_number();
+		printf("A new number has been chosen.\n");
+		read_guesses();
+		printf("Play again?(Y/N)");
+		scanf(" %c", &command);// ע�� %c ǰ�Ŀո������Ҫ
+		printf("\n");
+	} while (command == 'y' || command == 'Y');
+
+	return 0;
+}
+
+// ������������ע�ͽ������Ĺ���д�ں����Ķ�����Ϸ�
+// �Ҹ��˱Ƚ�ϲ�����򵥵�ע��д�ں���ԭ�ʹ�
+
+/****************************************************************************
+*
+* generate_secret_number: Initilizes the random number generator using the  
+*						 time of day.Randomly selects a number between     
+*						 1 and MAX_NUMBER and stores it in secret_number  
+*
+*****************************************************************************/
+
+void generate_secret_number() {
+
+	srand((unsigned)time(NULL));
+
+	secret_number = rand() % MAX_NUMBER + 1;
+}
+
+/*****************************************************************
+*
+* read_guesses��Repeatedly reads user guesses and gives hints
+*               When guess is right,prints the total number of 
+*				guesses and returns
+*
+******************************************************************/
+
+void read_guesses() {
+
+	int guess, count = 0;
+
+	for (;;) {
+		printf("Enter guess: ");
+		scanf("%d", &guess);
+		count++;
+		if (guess > secret_number) {
+			printf("Too high; try again\n");
+		}
+		else if (guess < secret_number) {
+			printf("Too low; try again.\n");
+		}
+		else {
+			printf("You won in %d guesses!\n\n", count);
+			return;
+		}
+	}
diff --git a/code/practise/10 程序结构/01 猜数/no_global_variable.c b/code/practise/10 程序结构/01 猜数/no_global_variable.c
new file mode 100644
index 0000000..23473c0
--- /dev/null
+++ b/code/practise/10 程序结构/01 猜数/no_global_variable.c	
@@ -0,0 +1,59 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<time.h>
+
+#define MAX_NUMBER 100
+
+int generate_secret_number();// ���������
+void read_guesses(int secret_number); // �µ�ʵ��
+
+int main(void) {
+
+	char command;
+	int secret_number;
+
+	printf("Guess the secret number between 1 and 100.\n");
+	
+	do {
+		secret_number = generate_secret_number();
+		printf("A new number has been chosen.\n");
+		read_guesses(secret_number);
+		printf("Play again?(Y/N)");
+		scanf(" %c", &command);
+		printf("\n");
+	} while (command == 'y' || command == 'Y');
+
+	return 0;
+}
+
+
+int generate_secret_number() {
+
+	srand((unsigned)time(NULL));
+
+	int secret_number = rand() % MAX_NUMBER + 1;
+
+	return secret_number;
+}
+
+void read_guesses(int secret_number) {
+
+	int guess, count = 0;
+
+	for (;;) {
+		printf("Enter guess: ");
+		scanf("%d", &guess);
+		count++;
+		if (guess > secret_number) {
+			printf("Too high; try again\n");
+		}
+		else if (guess < secret_number) {
+			printf("Too low; try again.\n");
+		}
+		else {
+			printf("You won in %d guesses!\n\n", count);
+			return;
+		}
+	}
+}
+
diff --git a/code/practise/10 程序结构/01 猜数/readme.md b/code/practise/10 程序结构/01 猜数/readme.md
new file mode 100644
index 0000000..7623241
--- /dev/null
+++ b/code/practise/10 程序结构/01 猜数/readme.md	
@@ -0,0 +1,19 @@
+#### 程序：猜数
+
+程序产生一个 1 ~ 100 的随机数，用户尝试用尽可能少的次数猜出这个数。程序运行如下：
+
+```c
+Guess the secret number between 1 and 100.
+    
+A new number has been chosen.
+Enter guess:55
+Too low; try again.
+Enter guess:65
+Too high; try again.
+Enter guess: 60
+You won in 3 guesses!
+ 
+Play again?(Y/N) n
+```
+
+使用两种方法：使用全局变量/不使用全局变量
\ No newline at end of file
diff --git a/code/practise/10 程序结构/02 手牌分类/main.c b/code/practise/10 程序结构/02 手牌分类/main.c
new file mode 100644
index 0000000..ea1c2d2
--- /dev/null
+++ b/code/practise/10 程序结构/02 手牌分类/main.c	
@@ -0,0 +1,209 @@
+/*
+ * �����ѵ�˼·��
+ *				1��Ϊ���ж����е����Ƿ��ظ���������Ҫһ��������������洢�����ƣ���ʼ����������Ϊ false�����һ�����Ѿ����������ϣ���ô���ǽ������Ӧ��Ԫ����Ϊ true
+ *				2���������ֱ��������洢ÿ�������ͻ�ɫ�ĸ����������������Ǻ����ж��Ƶ�����
+ *				3��8 ���Ƶ����ͣ����ǿɲ�� ͬ����˳�ӣ�4�ţ�3�ţ����ӣ�ֵΪ 0��1��2�������ֻ������͵���ϡ�
+ *
+ * ����ṹ��
+ *			ͨ������ķ��������Ƿ��֣����������Ҫ 3 ������� 5 ���������������Ϊ�����������Σ��Ե���Щ����
+ *			���ң�ǰ������˵��������ֻ�ܷ���һ��ֵ�������Ҫ���������룬 5 �ֻ������;͵÷Ž����飻����ʹ��ָ�룬��ָ������û��ѧϰ������ָ�뻹���Ӳ�������
+ *			����һ������ò��ʹ��ȫ�ֱ�������õ������ˡ����ڳ�ѧ����˵����������ȷʵ����õġ�
+ *			���ǣ�ʹ�ô�����ȫ�ֱ����Ǻܲ��õ�ϰ�ߣ��Ҳ������Լ�ȥд�����Ĵ��롣����Ϊ����������ⲻ����Ҳ�����л��Ĵ�����ȥд��
+ *			�������ǻ�ѧϰ�Զ������ͣ��ṹ�壬������������������õĽ��������
+ *			
+ *			�������������� 4 �ֽ��������
+ *			1)Ӧ��ȫ�ֱ���
+ *			2��Ӧ��ָ����Ϊ��������
+ *			3�����жϿ������͵ĺ������ӡ�����ϲ�
+ *			4��ʹ�ýṹ��
+ *
+ *			������Ҽ��ʹ�ýṹ��������������⡣ȫ�ֱ������ֻҪ֪������ɣ������������˵�����𷽷���������Ƴ����ģ�黯˼·��ֵ��ѧϰ��
+ *			��ʹʹ�ýṹ�壬�������Ҫ�߼�Ҳ����䡣������Ҫ��ȫ�ֱ���д��������Ը�дһ�¡�
+ */
+
+#include<stdio.h>
+#include<stdbool.h>
+
+#define RANK 13
+#define SUIT 4
+#define CARD 5
+
+typedef struct CardType {
+	bool flush; //ͬ��
+	bool straight; //˳��
+	bool four; //����
+	bool three; //����
+	int pair; // ����
+	// 0 ��ʾ���� 1 ��ʾ 1������ 2 ��ʾ��������
+	bool cardInHand[SUIT][RANK]; // �жϴ����Ƿ���������
+	int numRank[RANK]; // ÿ�������ĸ���
+	int numSuit[SUIT]; // ÿ����ɫ�ĸ���
+}CardType;
+
+
+void initCardType(CardType* card); // ��ʼ��
+void readCard(CardType* card); // ��ȡ����
+void analyseCard(CardType* card); // ��������
+void printResult(CardType* card); //��ӡ���
+
+int main(void) {
+
+	CardType card;
+	
+	for (; ;) {
+		initCardType(&card);
+		readCard(&card);
+		analyseCard(&card);
+		printResult(&card);
+	}
+
+	return 0;
+}
+
+
+void initCardType(CardType* card) {
+
+	card->flush = false;
+	card->straight = false;
+	card->four = false;
+	card->three = false;
+	card->pair = 0;
+
+	int i, j;
+
+	for (i = 0; i < SUIT; i++) {
+		card->numSuit[i] = 0;
+		for (j = 0; j < RANK; j++) {
+			card->cardInHand[i][j] = false;
+		}
+	}
+
+	for (i = 0; i < RANK; i++) {
+		card->numRank[i] = 0;
+	}
+
+}
+
+
+void readCard(CardType* card) {
+
+	int card_read = CARD, rank, suit;
+	bool bad_card;
+	char ch;
+
+	while (card_read) {
+		
+		bad_card = false; // ��Ҫ�������û��Ƶı��
+
+		printf("Enter a card : ");
+		
+		// �жϵ���
+		ch = getchar();
+		switch (ch) {
+			case '0':			exit(0); break;
+			case '2':		   rank = 0; break;
+			case '3':		   rank = 1; break;
+			case '4':		   rank = 2; break;
+			case '5':		   rank = 3; break;
+			case '6':		   rank = 4; break;
+			case '7':		   rank = 5; break;
+			case '8':		   rank = 6; break;
+			case '9':		   rank = 7; break;
+			case 't':case 'T': rank = 8; break;
+			case 'j':case 'J': rank = 9; break;
+			case 'q':case 'Q': rank = 10; break;
+			case 'k':case 'K': rank = 11; break;
+			case 'a':case 'A': rank = 12; break;
+			default:bad_card = true; break;
+		}
+
+		ch = getchar();
+		switch (ch) {
+			case 'c': case 'C': suit = 0; break;
+			case 'd': case 'D': suit = 1; break;
+			case 'h': case 'H': suit = 2; break;
+			case 's': case 'S': suit = 3; break;
+			default: bad_card = true; break;
+		}
+		
+		// ������ ���� 1 
+		// ��������Ƿ���������ַ�
+		while ((ch = getchar()) != '\n') {
+			if (ch != ' ')
+				bad_card = true;
+		}
+
+		if (bad_card)
+			printf("Bad card; ignored.\n");
+		else if (card->cardInHand[suit][rank])
+			printf("Duplicated card; ignored.\n");
+		else {
+			++card->numRank[rank];
+			++card->numSuit[suit];
+			card->cardInHand[suit][rank] = true;
+			card_read--;
+		}
+	}
+}
+
+void analyseCard(CardType* card) {
+
+	int i, count;
+
+	// ͬ������������ͬ��ɫ
+	for (i = 0; i < SUIT; i++) {
+		if (card->numSuit[i] == 5)
+			card->flush = true;
+	}
+	
+	// ������ ���� 2 
+	// ˳���������������ƣ��м䲻�ܸ���
+	
+	i = 0;
+	// �ҵ������ֵ�һ�Ŵ��ڵ���
+	while (card->numRank[i] == 0)
+		i++;
+	count = 0;
+	for (; i < RANK && card->numRank[i] != 0; i++) {
+		count++;
+	}
+	// ˳�ӱ���������
+	if (count == CARD) {
+		card->straight = true;
+		return; // ˳�ӿ϶����Ƕ���
+	}
+
+	for (i = 0; i < RANK; i++) {
+		if (card->numRank[i] == 4)
+			card->four = true;
+		if (card->numRank[i] == 3)
+			card->three = true;
+		if (card->numRank[i] == 2)
+			++card->pair;
+	}
+	
+}
+
+void printResult(CardType* card) {
+
+	if (card->flush && card->straight)
+		printf("Stright flush\n");
+	else if (card->four)
+		printf("Four of a kind\n");
+	else if (card->three && card->pair == 1)
+		printf("Full house\n");
+	else if (card->flush)
+		printf("flush\n");
+	else if (card->straight)
+		printf("straight\n");
+	else if (card->three)
+		printf("Three of a kind\n");
+	else if (card->pair == 2)
+		printf("Two pairs\n");
+	else if (card->pair == 1)
+		printf("pair\n");
+	else
+		printf("High card\n");
+	
+	printf("\n\n");
+}
diff --git a/code/practise/10 程序结构/02 手牌分类/readme.md b/code/practise/10 程序结构/02 手牌分类/readme.md
new file mode 100644
index 0000000..afdaffd
--- /dev/null
+++ b/code/practise/10 程序结构/02 手牌分类/readme.md	
@@ -0,0 +1,56 @@
+#### 程序：手牌分类
+
+编写程序对手牌进行读取和分类。手中的每张牌都有花色（方块，梅花，红桃和黑桃）和等级（2，3，4，5，6，7，8，9，T，J，Q，K 和 A）。不允许使用王牌，并且假设 A 是最高等级的。一手 5 张牌，然后把手中的牌分为下列某一类（列出的顺序从好到坏）。
+
+- 同花顺（顺序连续且同花色）
+- 四张（4 张牌等级相同）
+- 葫芦（3 张牌等级一样，另外2 张等级一样）
+- 同花（5 张牌同花色）
+- 顺子（5 张牌等级顺序连续）
+- 三张（3 张牌等级连续）
+- 两对
+- 一对（2 张牌等级一样）
+- 其他牌
+
+如果一手牌可以分为两种或多种类别，程序将选择最好的一种。
+
+为了便于输入，将牌的等级和花色简化如下：
+
+- 等级： 2，3，4，5，6，7，8，9，T，J，Q，K ，A
+- 花色：c d h  s
+
+如果用户输入非法牌或者输入同一张牌两次，程序将此牌忽略掉，产生错误信息，然后要求输入另一张牌。如果输入为 0 而不是一张牌，就会导致程序终止。
+
+与程序的会话如下：
+
+```c
+Enter a card : 2s
+Enter a card : 5s
+Enter a card : 4s
+Enter a card : 3s
+Enter a card : 6s
+Straight flush
+
+Enter a card : 8c
+Enter a card : as
+Enter a card : 8c
+Duplicated card; ignored.
+Enter a card : 7c
+Enter a card : ad
+Enter a card : 3h
+Pair
+
+Enter a card : 6s
+Enter a card : d2
+Bad card; ignored.
+Enter a card : 2d
+Enter a card : 9c
+Enter a card : 4h
+Enter a card : ts
+High card
+
+Enter a card: 0
+```
+
+
+