diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index cd531cf..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,54 +0,0 @@
-# ---> C
-# Prerequisites
-*.d
-
-# Object files
-*.o
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Libraries
-*.lib
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
-
-# Executables
-*.exe
-*.out
-*.app
-*.i*86
-*.x86_64
-*.hex
-
-# Debug files
-*.dSYM/
-*.su
-*.idb
-*.pdb
-
-# Kernel Module Compile Results
-*.mod*
-*.cmd
-.tmp_versions/
-modules.order
-Module.symvers
-Mkfile.old
-dkms.conf
-
diff --git a/README.md b/README.md
deleted file mode 100644
index c9499da..0000000
--- a/README.md
+++ /dev/null
@@ -1,382 +0,0 @@
-# System
-#学生成绩管理系统代码
-
-## 多个函数的使用
-
-## 利用结构体
-下面是代码库
-````c
-
-#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
-{
-		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 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]);
-    }
-
-    /* ----------- end ----------- */
-}
-// 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)
-{
-	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 ----------- */
-}
-// 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))
-{
-	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 
-		}
-	}
-}
-// 使数据按升序排序 
-int Ascending(float a, float b)
-{
-	return a < b;     // 这样比较决定了按升序排序，如果a<b，则交换 
-}
-// 使数据按降序排序 
-int Descending(float a, float b)
-{
-	return a > b;    // 这样比较决定了按降序排序，如果a>b，则交换 
-}
-// 交换两个单精度浮点型数据 
-void  SwapFloat(float *x, float *y)
-{
-float  temp;
-temp = *x; 
-*x = *y;  
-*y = temp;
-}
-// 交换两个长整型数据 
-void  SwapLong(long *x, long *y)
-{
-long   temp;
-temp = *x; 
-*x = *y;  
-*y = temp;
-}
-// 交换两个字符串 
-void  SwapChar(char x[], char y[])
-{
-char temp[MAX_LEN];
-strcpy(temp, x);
-strcpy(x, y);
-strcpy(y, temp);
-}
-// 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 ---------- */
-		
-        /* ----------- 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)
-{
-	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 
-			  }
-		  }
-	 }
-}
-// 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)
-{
-	long  number;
-	int   i, j;
-	printf("Input the number you want to search:");
-	scanf("%ld", &number);
-    
-    /* ---------- begain ---------- */
-	
-    /* ----------- end ----------- */
-	
-	printf("\nNot found!\n");
-}
-// 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)
-{
-	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");
-}
-// 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)
-{
-	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);	
-		}
-	}
-}
-// 函数功能： 打印学生成绩 
-void PrintScore(STU stu[], int n, int m)
-{
-	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);
-	}
-}
-// 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)
-{
-	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);
-}
-//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)
-{
-	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);		
-}
-````
\ No newline at end of file
diff --git a/hello.md b/hello.md
deleted file mode 100644
index e928e9a..0000000
--- a/hello.md
+++ /dev/null
@@ -1,16 +0,0 @@
-````
-//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]);
-    }
-
-    /* ----------- end ----------- */
-}
-````
\ No newline at end of file
diff --git a/hello1.md b/hello1.md
deleted file mode 100644
index fd1a645..0000000
--- a/hello1.md
+++ /dev/null
@@ -1,18 +0,0 @@
-void  AverSumofEveryCourse(STU stu[], int n, int m)
-{
-	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 ----------- */
-}
\ No newline at end of file
diff --git a/hello2.md b/hello2.md
deleted file mode 100644
index f4a1285..0000000
--- a/hello2.md
+++ /dev/null
@@ -1,10 +0,0 @@
-void AsSortbyNum(STU stu[], int n, int m)
-{
-	int  i, j, k, t;
-	for (i=0; i<n-1; i++)
-	{
-        /* ---------- begain ---------- */
-		
-        /* ----------- end ----------- */
-	}
-}
\ No newline at end of file
diff --git a/hello3.md b/hello3.md
deleted file mode 100644
index 810c3ec..0000000
--- a/hello3.md
+++ /dev/null
@@ -1,13 +0,0 @@
-void SearchbyNum(STU stu[], int n, int m)
-{
-	long  number;
-	int   i, j;
-	printf("Input the number you want to search:");
-	scanf("%ld", &number);
-    
-    /* ---------- begain ---------- */
-	
-    /* ----------- end ----------- */
-	
-	printf("\nNot found!\n");
-}
\ No newline at end of file
diff --git a/readme1.md b/readme1.md
deleted file mode 100644
index 17da5b8..0000000
--- a/readme1.md
+++ /dev/null
@@ -1,23 +0,0 @@
-
-
-C4: 添加学生信息
-选择菜单命令 1 ，假设n=4,m=3,提示输入学生的学号，姓名和成绩，然后利用循环逐个输入学生的学号和姓名以及各科成绩。
-````
-请输入你的选择：1
-输入学生的学号，名字和成绩：
-2214111018 李玉璇 100 95 86
-2214111038 张桐桐 77 89 99
-2214111026 孟婷玉 85 91 98
-2214111022 周羽凡 75 89 100
-
-````
-C5: 计算学生各门课程总分和平均分
-选择菜单命令 2 ，计算学生各门课程总分和平均分,然后利用循环逐个输出学生的顺序，总成绩和平均分，结果都取整数。
-````
-请输入你的选择：2
-学生 李玉璇： 总分 = 281， 平均分 = 93
-学生 张桐桐： 总分 = 265， 平均分 = 88
-学生 孟婷玉： 总分 = 274， 平均分 = 91
-学生 周羽凡： 总分 = 264， 平均分 = 88
-
-````
\ No newline at end of file