diff --git a/text.c b/text.c
index 8a4bc22..6538439 100644
--- a/text.c
+++ b/text.c
@@ -1,383 +1,354 @@
-#include  <stdio.h>
-#include  <stdlib.h>
-#include  <string.h>
-#define   MAX_LEN  10                    	// 字符串最大长度 
-#define   STU_NUM 30                       // 最多的学生人数 
-#define   COURSE_NUM 6                     // 最多的考试科目数 
-typedef struct student
+#define NAME_LEN 31
+#define MAX_PARTS 100
+//保存学生成绩信息的结构
+struct students
 {
-	long num;						// 每个学生的学号 
-	char name[MAX_LEN];            	// 每个学生的姓名 
-	float score[COURSE_NUM];		// 每个学生COURSE_NUM门功课的成绩 
-	float sum;                   	     // 每个学生的总成绩 
-	float aver;               	     // 每个学生的平均成绩 
-}STU;
-int   Menu(void);
-void  ReadScore(STU stu[], int n, int m);
-void  AverSumofEveryStudent(STU stu[], int n, int m);
-void  AverSumofEveryCourse(STU stu[], int n, int m);
-void  SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b));
-int   Ascending(float a, float b);
-int   Descending(float a, float b);
-void  SwapFloat(float *x, float *y);
-void  SwapLong(long *x, long *y);
-void  SwapChar(char x[], char y[]);
-void  AsSortbyNum(STU stu[], int n, int m);
-void  SortbyName(STU stu[], int n, int m);
-void  SearchbyNum(STU stu[], int n, int m);
-void  SearchbyName(STU stu[], int n, int m);
-void  StatisticAnalysis(STU stu[], int n, int m);
-void  PrintScore(STU stu[], int n, int m);
-void  WritetoFile(STU record[], int n, int m);
-void  ReadfromFile(STU record[], int *n, int *m);
+    int number;
+    char name[NAME_LEN + 1];
+    int score;
+};
+static struct students stu[MAX_PARTS];
+static int num_parts = 0;
+#include <stdio.h>
+#include <stdlib.h>
+
+//定义常量
+#define CMD_QUIT 0
+#define CMD_QUERY 4
+#define CMD_INSERT 5
+#define CMD_UPDATE 6
+#define CMD_DELETE 7
+#define CMD_READ 1
+#define CMD_SAVE 2
+#define CMD_PRINT 3
+#define CMD_SORT 8
+#define CMD_CHART 9
+// 菜单命令的编号
+
+// 函数声明
+void init(void);
+void quit(void);
+void display_menu(void);
+int make_choice(void);
+void read_data(void);   // 读取
+void save_data(void);   // 保存
+void print_data(void);  // 打印
+void query_data(void);  // 查询
+void add_data(void);    // 添加
+void update_data(void); // 修改
+void delete_data(void); // 删除
+void sort_data(void);   // 排序
+void make_chart(void);  // 图表
+int confirm(const char *msg);
+
+// 主程序
 int main(void)
 {
-	char  ch;
-	int   n = 0, m = 0;
-	STU   stu[STU_NUM];	
-printf("Input student number(n<%d):", STU_NUM);
-	scanf("%d", &n);
-printf("Input course number(m<=%d):",COURSE_NUM);
-	scanf("%d", &m);
-	while (1)
-	{
-		ch = Menu();				    // 显示菜单，并读取用户输入 		
-		switch (ch)
-		{
-			case 1:ReadScore(stu, n, m);
-					break;
-			case 2: AverSumofEveryCourse(stu, n, m);                        
-					break;
-            case 3: AverSumofEveryStudent(stu, n, m);                    
-					break;
-			case 4: SortbyScore(stu, n, m, Descending);
-					printf("\nSort in descending order by score:\n");
-					PrintScore(stu, n, m);
-					break;
-			case 5: SortbyScore(stu, n, m, Ascending);
-					printf("\nSort in ascending order by score:\n");
-					PrintScore(stu, n, m);
-					break;
-			case 6: AsSortbyNum(stu, n, m);
-					printf("\nSort in ascending order by number:\n");
-					PrintScore(stu, n, m);
-					break;
-			case 7: SortbyName(stu, n, m);
-					printf("\nSort in dictionary order by name:\n");
-					PrintScore(stu, n, m);
-					break;
-			case 8: SearchbyNum(stu, n, m);
-					break;
-			case 9: SearchbyName(stu, n, m);
-					break;
-			case 10: StatisticAnalysis(stu, n, m);
-					break;
-			case 11:PrintScore(stu, n, m);
-					break;
-case 12:WritetoFile(stu, n, m);
-				     break;
-			case 13:ReadfromFile(stu, &n, &m);
-				     break;
-			case 0: printf("End of program!");
-			       	exit(0);
-			default:printf("Input error!");
-		}
-	}
-	return 0;}
-//  函数功能：显示菜单并获得用户键盘输入的选项 
-int Menu(void)
-{
-		int itemSelected;
-		printf("Management for Students' scores\n");
-		printf("1.Input record\n");
-		printf("2.Calculate total and average score of every course\n");
-		printf("3.Calculate total and average score of every student\n");
-		printf("4.Sort in descending order by score\n");
-		printf("5.Sort in ascending order by score\n");
-		printf("6.Sort in ascending order by number\n");
-		printf("7.Sort in dictionary order by name\n");
-		printf("8.Search by number\n");
-		printf("9.Search by name\n");
-		printf("10.Statistic analysis\n");
-		printf("11.List record\n");
-		printf("12.Write to a file\n");
-		printf("13.Read from a file\n");
-		printf("0.Exit\n");
-		printf("Please Input your choice:");
-		scanf("%d", &itemSelected); 	// 读入用户输入 
-		return itemSelected;
-}
-// 函数功能：输入n个学生的m门课成绩 
-void ReadScore(STU stu[], int n, int m)
-{
-	int i, j;
-	printf("Input student's ID, name and score:\n");
-    /* ---------- begain ---------- */
-    for(i=0;i<n;i++)
-    {scanf("%ld%s",&stu[i].num,stu[i].name);
-     for (j=0; j<m; j++)
-     scanf("%f",&stu[i].score[j]);
+    init(); // 程序启动
+    while (1)
+    {
+        display_menu();
+        int c = make_choice();
+        switch (c)
+        {
+        case CMD_QUERY:
+            query_data();
+            break;
+        case CMD_INSERT:
+            add_data();
+            break;
+        case CMD_UPDATE:
+            update_data();
+            break;
+        case CMD_DELETE:
+            delete_data();
+            break;
+        case CMD_READ:
+            read_data();
+            break;
+        case CMD_SAVE:
+            save_data();
+            break;
+        case CMD_PRINT:
+            print_data();
+            break;
+        case CMD_SORT:
+            sort_data();
+            break;
+        case CMD_CHART:
+            make_chart();
+            break;
+        default:
+            puts("命令错误，请重新选择");
+            break;
+        case CMD_QUIT:
+            if (confirm("确定要退出吗？"))
+                quit(); // 仅在确认后退出
+            break;
+        }
     }
-
-    /* ----------- end ----------- */
+    return 0;
 }
-// 函数功能：计算每个学生各门课程的总分和平均分 
-void AverSumofEveryStudent(STU stu[], int n, int m)
-{
-	int i, j;
-	for (i=0; i<n; i++)
-	{
-	    stu[i].sum = 0;
-	    for (j=0; j<m; j++)
-	    {
-            stu[i].sum = stu[i].sum + stu[i].score[j];
-	    }
-	    stu[i].aver = m>0 ? stu[i].sum / m : -1;
-	    printf("student %d: sum = %.0f, aver = %.0f\n", 
-i+1, stu[i].sum, stu[i].aver);
-	}	
-}
-// 函数功能：计算每门课程的总分和平均分 
-void  AverSumofEveryCourse(STU stu[], int n, int m)
+
+// 函数定义
+void init(void)
 {
-	int i, j;
-    float sum[COURSE_NUM], aver[COURSE_NUM];
-    /* ---------- begain ---------- */
-	for (j=0; j<m; j++)
-	{
-	    sum[j] = 0;
-	    for (i=0; i<n; i++)
-	    {
-            sum[j] +=  stu[i].score[j];
-	    }
-        aver[j]=sum[j]/i;
-        printf("student %d: sum = %.0f, aver = %.0f\n", 
-j+1, sum[j], aver[j]); 
-    }
-    /* ----------- end ----------- */
+    puts("程序启动");
 }
-// 函数功能：按选择法将数组sum的元素值排序 
-void SortbyScore(STU stu[],int n,int m,int (*compare)(float a,float b))
+void quit(void)
 {
-	int  i, j, k, t;
-	for (i=0; i<n-1; i++)
-	{
-		k = i;
-		for (j=i+1; j<n; j++)
-		{
-			if ((*compare)(stu[j].sum, stu[k].sum)) k = j;
-		}
-		if (k != i)
-		{		   
-		   for (t=0; t<m; t++)             // 交换m门课程的成绩 
-            {
-                SwapFloat(&stu[k].score[t], &stu[i].score[t]);
-            }
-SwapFloat(&stu[k].sum, &stu[i].sum);    // 交换总分 
-SwapFloat(&stu[k].aver, &stu[i].aver); // 交换平均分   
-SwapLong(&stu[k].num, &stu[i].num);     // 交换学号 
-SwapChar(stu[k].name, stu[i].name);     // 交换姓名 
-		}
-	}
+    puts("程序退出");
+    exit(EXIT_SUCCESS);
 }
-// 使数据按升序排序 
-int Ascending(float a, float b)
+void display_menu(void)
 {
-	return a < b;     // 这样比较决定了按升序排序，如果a<b，则交换 
+    printf("\n%d 读取 | %d 保存 | %d 打印 | %d 查询 | %d 添加\n%d 修改 | %d 删除 | %d 排序 | %d 图表 | %d 退出\n\n", CMD_READ, CMD_SAVE, CMD_PRINT, CMD_QUERY, CMD_INSERT, CMD_UPDATE, CMD_DELETE, CMD_SORT, CMD_CHART, CMD_QUIT);
 }
-// 使数据按降序排序 
-int Descending(float a, float b)
+int make_choice(void)
 {
-	return a > b;    // 这样比较决定了按降序排序，如果a>b，则交换 
+    int c;     // 用户输入
+    int n = 0; // 正确读入的数据项个数
+    while (n == 0)
+    {
+        printf("请选择：");
+        n = scanf("%d", &c); // 尝试读入整数 c
+        scanf("%*[^\n]");    // 跳过一行中剩余的字符
+    }
+    return c;
 }
-// 交换两个单精度浮点型数据 
-void  SwapFloat(float *x, float *y)
+
+//查询
+void query_data(void)
 {
-float  temp;
-temp = *x; 
-*x = *y;  
-*y = temp;
+    int num;
+    printf("输入学生学号： ");
+    scanf("%d", &num);
+    int f = -1;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = i;
+            break;
+        }
+    }
+    if (f == -1)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("学生学号：%d\n", stu[f].number);
+        printf("学生姓名：%s\n", stu[f].name);
+        printf("学生成绩：%d\n", stu[f].score);
+    }
 }
-// 交换两个长整型数据 
-void  SwapLong(long *x, long *y)
+
+//打印
+void print_data(void)
 {
-long   temp;
-temp = *x; 
-*x = *y;  
-*y = temp;
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s                    %d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
 }
-// 交换两个字符串 
-void  SwapChar(char x[], char y[])
+
+//添加
+void add_data(void)
 {
-char temp[MAX_LEN];
-strcpy(temp, x);
-strcpy(x, y);
-strcpy(y, temp);
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        stu[num_parts].number = num;
+        printf("输入学生姓名：");
+        scanf("%s", &stu[num_parts].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num_parts].score);
+        num_parts++;
+        printf("学生 %d 添加成功\n", num);
+    }
+    else
+    {
+        printf("学生已存在");
+    }
 }
-// 函数功能：按选择法将数组num的元素值按从低到高排序 
-void AsSortbyNum(STU stu[], int n, int m)
-{
-	int  i, j, k, t;
-	for (i=0; i<n-1; i++)
-	{
-        /* ---------- begain ---------- */
 
-k=i;
-for (j=i+1;j<10;j++){
-if((*compare)(stu[k]num.stu[j].num)) k=j;}
-if(k!=i){t=stu[i].num;stu[i].num=stu[k].num;stu[k].num=t;}
-	
-        /* ----------- end ----------- */
-	}
-}
-// 函数功能：交换法实现字符串按字典顺序排序 
-void SortbyName(STU stu[], int n, int m)
+//修改
+void update_data(void)
 {
-	int  i, j, t;
-	for (i=0; i<n-1; i++)
-	{
-		  for (j = i+1; j<n; j++)
-		  {
-			  if (strcmp(stu[j].name, stu[i].name) < 0)
-			  {				  
-				  for (t=0; t<m; t++)// 交换m门课程的成绩 
-                     {
-				      SwapFloat(&stu[i].score[t], &stu[j].score[t]);
-			       } 
-SwapFloat(&stu[i].sum, &stu[j].sum);    // 交换总分 
-SwapFloat(&stu[i].aver, &stu[j].aver); // 交换平均分   
-SwapLong(&stu[i].num, &stu[j].num);     // 交换学号 
-SwapChar(stu[i].name, stu[j].name);     // 交换姓名 
-			  }
-		  }
-	 }
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0;
+    for (int i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        printf("输入学生学号：");
+        scanf("%d", &stu[num].number);
+        printf("输入学生姓名：");
+        scanf("%s", stu[num].name);
+        printf("输入学生成绩：");
+        scanf("%d", &stu[num].score);
+        printf("学生 %d 已更新", num);
+    }
 }
-// 函数功能：按学号查找学生成绩并显示查找结果 
-void SearchbyNum(STU stu[], int n, int m)
+
+//删除
+void delete_data(void)
 {
-	long  number;
-	int   i, j;
-	printf("Input the number you want to search:");
-	scanf("%ld", &number);	
-For(i=0;i<n;i++){
-If（strcmp(number,stu[i].num)==0)
-printf("%ld\t%s\t", stu[i].num, stu[i].name);
-			for (j=0; j<m; j++)
-			{
-				printf("%.0f\t", stu[i].score[j]);
-			}
-			printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
-			return;
-		}
-	}	
-	printf("\nNot found!\n");
+    int num;
+    printf("输入学生学号：");
+    scanf("%d", &num);
+    int f = 0, i, j;
+    for (i = 0; i < num_parts; i++)
+    {
+        if (num == stu[i].number)
+        {
+            f = 1;
+            break;
+        }
+    }
+    if (f == 0)
+    {
+        printf("学生不存在");
+    }
+    else
+    {
+        for (j = i; j < num_parts - 1; j++)
+        {
+            stu[j] = stu[j + 1];
+        }
+        num_parts--;
+        printf("删除成功");
+    }
 }
-// 函数功能：按姓名的字典顺序排出成绩表 
-void SearchbyName(STU stu[], int n, int m)
+
+void read_data(void)
 {
-	char x[MAX_LEN];
-	int  i, j;
-	printf("Input the name you want to search:");
-	scanf("%s", x);
-	for (i=0; i<n; i++)
-	{
-		if (strcmp(stu[i].name, x) == 0)
-		{
-			printf("%ld\t%s\t", stu[i].num, stu[i].name);
-			for (j=0; j<m; j++)
-			{
-				printf("%.0f\t", stu[i].score[j]);
-			}
-			printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
-			return;
-		}
-	}
-	printf("\nNot found!\n");
+    puts("读取数据");
+    printf("请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    int i = 0;
+    while (fscanf(fp, "%d,%[^,],%d", &stu[i].number, stu[i].name, &stu[i].score) == 3)
+    {
+        i++;
+    }
+    fclose(fp);
+    num_parts = i;
+    printf("读取 %d 记录\n", num_parts);
 }
-// 函数功能：统计各分数段的学生人数及所占的百分比 
-void StatisticAnalysis(STU stu[], int n, int m)
+
+void save_data(void)
 {
-	int  i, j, t[6];
-	for (j=0; j<m; j++)
-	{
-		printf("For course %d:\n", j+1);
-	     memset(t, 0, sizeof(t));    // 将数组t的全部元素初始化为0 
-		for (i=0; i<n; i++)
-		{
-			if (stu[i].score[j]>=0 && stu[i].score[j]<60)t[0]++;
-			else if (stu[i].score[j]<70)				   t[1]++;
-			else if (stu[i].score[j]<80)				   t[2]++;
-			else if (stu[i].score[j]<90)				   t[3]++;
-			else if (stu[i].score[j]<100)				   t[4]++;
-			else if (stu[i].score[j] == 100)      		   t[5]++;
-		}
-		for (i=0; i<=5; i++)
-		{
-            if (i==0) printf("<60\t%d\t%.2f%%\n",t[i],(float)t[i]/n*100);
-	       else if (i==5) printf("%d\t%d\t%.2f%%\n",
-(i+5)*10,t[i],(float)t[i]/n*100);
-	       else 	printf("%d-%d\t%d\t%.2f%%\n", 
-(i+5)*10, (i+5)*10+9, t[i], (float)t[i]/n*100);	
-		}
-	}
+    puts("保存数据");
+    printf(" 请输入文件名");
+    char filename[256];
+    scanf("%s", filename);
+    FILE *fp = fopen(filename, "r");
+    if (fp == NULL)
+    {
+        perror(filename);
+        return;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        fprintf(fp, "%d,%s,%d\n", stu[i].number, stu[i].name, stu[i].score);
+    }
+    fclose(fp);
+    printf("保存%d 成功", num_parts);
 }
-// 函数功能： 打印学生成绩 
-void PrintScore(STU stu[], int n, int m)
+
+//排序
+void sort_data(void)
 {
-	int i, j;
-	for (i=0; i<n; i++)
-	{
-		printf("%ld\t%s\t", stu[i].num, stu[i].name);
-		for (j=0; j<m; j++)
-		{
-			printf("%.0f\t", stu[i].score[j]);
-		}
-		printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
-	}
+    printf("排序\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].number > stu[j + 1].number)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    for (int i = 0; i < num_parts; i++)
+    {
+        int change = 0;
+        static struct students t;
+        for (int j = 0; j < num_parts - i - 1; j++)
+        {
+            if (stu[j].score > stu[j + 1].score)
+            {
+                t = stu[j + 1];
+                stu[j + 1] = stu[j];
+                stu[j] = t;
+                change = 1;
+            }
+        }
+        if (!change)
+            break;
+    }
+    printf("排序已完成");
 }
-// 输出n个学生的学号、姓名及m门课程的成绩到文件student.txt中 
-void WritetoFile(STU stu[], int n, int m)
+
+void make_chart(void)
 {
-	FILE *fp;
-	int i, j;
-     
-	if ((fp = fopen("student.txt","w")) == NULL) 
-	{ 
-		printf("Failure to open score.txt!\n");
-		exit(0);
-	}
-fprintf(fp, "%d\t%d\n", n, m);    //将学生人数和课程门数写入文件
-	for (i=0; i<n; i++)
-	{
-		fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name);
-		for (j=0; j<m; j++)
-		{
-			fprintf(fp, "%10.0f", stu[i].score[j]);
-		}
-		fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver);
-	}
-	fclose(fp);
+    printf("NUMBER  |  NAME                score\n");
+    for (int i = 0; i < num_parts; i++)
+    {
+        printf("%d  |  %s ", stu[i].number, stu[i].name);
+        for (int j = 0; j < stu[i].score; j++)
+        {
+            printf("*");
+        }
+        printf("\n");
+    }
+    printf("图表\n");
 }
-//从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
-void ReadfromFile(STU stu[],int *n, int *m)
+
+int confirm(const char *msg)
 {
-	FILE *fp;
-	int i, j;
-	if ((fp = fopen("student.txt","r")) == NULL) 
-	{ 
-		printf("Failure to open score.txt!\n");
-		exit(0);
-	}
-     fscanf(fp, "%d\t%d", n, m); // 从文件中读出学生人数和课程门数       
-	for (i=0; i<*n; i++)  //学生人数保存在n指向的存储单元
-	{
-		fscanf(fp, "%10ld", &stu[i].num);
-		fscanf(fp, "%10s", stu[i].name);  
-		for (j=0; j<*m; j++)//课程门数保存在m指向的存储单元
-		{
-			fscanf(fp, "%10f", &stu[i].score[j]);          //不能用%10.0f
-		}
-		fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver);//不能用%10.0f
-	}
-	fclose(fp);		
+    char c = 'n';                // 默认选择是 no
+    printf("%s(Y/N): ", msg);    // 提示输入 yes/no 进行确认
+    scanf(" %c%*[^\n]", &c);     // 读取第一个字符，忽略剩余字符
+    return c == 'y' || c == 'Y'; // 返回确认结果
 }
\ No newline at end of file