diff --git a/步骤7(未完成).cpp b/步骤7(未完成).cpp
new file mode 100644
index 0000000..8e8c6ca
--- /dev/null
+++ b/步骤7(未完成).cpp
@@ -0,0 +1,161 @@
+#include<stdio.h>
+#include<string.h>
+void sortexam(char *b[],char *name[],int f[],float c[],float d[],float e[],float g[],int h,int n)/*�༶�ڳɼ�����*/
+{
+	int i,j;
+	int t=0;
+	char a='0';
+	char *p=&a;
+	float k=0;
+	for(i=h;i<=n;i++)/*ð��*/
+	for(j=h;j<=n-i;j++)
+	{
+		if(g[j]<g[j+1])
+		{
+	    p=b[j];
+		b[j]=b[j+1];
+		b[j+1]=p;
+		p=name[j];
+		name[j]=name[j+1];
+		name[j+1]=p;
+		c[j]=c[j+1];
+		c[j+1]=k;
+		k=d[j];
+		d[j]=d[j+1];
+		d[j+1]=k;
+		k=e[j];
+		e[j]=e[j+1];
+		e[j+1]=k;
+			k=g[j];
+		g[j]=g[j+1];
+		g[j+1]=k;
+		}
+	}
+}
+void sortclass(char *b[],char *name[],int f[],float c[],float d[],float e[],float g[],int n)/*�༶�������*/
+{
+	int i,j;
+	char a='0';
+	char *p=&a;
+	int t=0;
+	float k=0;
+	for(i=1;i<=n;i++)/*ð��*/
+	for(j=1;j<=n-i;j++)
+	{
+		if(f[j]>f[j+1])
+		{
+		t=f[j];/*����*/
+		f[j]=f[j+1];
+		f[j+1]=t;
+		p=b[j];
+		b[j]=b[j+1];
+		b[j+1]=p;
+		p=name[j];
+		name[j]=name[j+1];
+		name[j+1]=p;
+		k=c[j];
+		c[j]=c[j+1];
+		c[j+1]=k;
+		k=d[j];
+		d[j]=d[j+1];
+		d[j+1]=k;
+		k=e[j];
+		e[j]=e[j+1];
+		e[j+1]=k;
+			k=g[j];
+		g[j]=g[j+1];
+		g[j+1]=k;
+		}
+	}
+}
+int deletename(char *b[],char *name[],int f[],float c[],float d[],float e[],float g[],int n)/*ɾ������*/
+{
+	int i,j;
+	int k;/*���泤��*/
+	k=n;
+	char a[1001];
+	gets(a);
+	for(i=1;i<=n;i++)
+	{
+		if(strcmp(b[i],a)==0||strcmp(name[i],a)==0)/*�Ƚ�*/
+		{
+			k--;
+		for(j=i;j<=n;j++)
+		{
+				b[j]=b[j+1];
+				name[j]=name[j+1];
+				f[j]=f[j+1];
+				c[j]=c[j+1];
+				d[j]=d[j+1];
+				e[j]=e[j+1];
+				g[j]=g[j+1]; 
+		}
+	}
+}
+return k;
+}
+char *change(char *b[],char *name[],int f[],float c[],float d[],float e[],float g[],int n)/*�޸ij���*/
+{
+    int i;  
+    char *sign1;/*�޸ij���ı��*/
+    char a[10001],a1[10001];
+    int a2;
+    float a4,a5,a6;
+	scanf("%s %d %s %f %f %f",&a,&a2,&a1,&a4,&a5,&a6);
+	for(i=1;i<=n;i++)
+	{
+	if(strcmp(b[i],a)==0)
+	{
+		    sign1=b[i];
+				name[i]=a1;
+				f[i]=a2;
+				c[i]=a4;
+				d[i]=a5;
+				e[i]=a6;
+				g[i]=g[i+1]; 
+	}	
+}
+return sign1;
+}
+void print(char *b[],char *name[],int f[],float c[],float d[],float e[],float g[],int n,char *sign1)/*�������*/
+{
+	int i;
+for(i=1;i<=n;i++)
+{
+	if(f[i]!=f[i-1])
+	printf("%d %s %s %.1f %.1f %.1f",f[i],b[i],name[i],c[i],d[i],e[i]);
+	else
+	printf("   %s %s %.1f %.1f %.1f",b[i],name[i],c[i],d[i],e[i]);
+	if(strcmp(b[i],sign1)==0)
+	printf(" modified");
+	printf("\n");
+}	
+}
+int main()
+{
+	char s[1001];
+	int i;
+	int k;
+	char *sign1;
+	int n=3; 
+	char *b[1001]={"0","10001","10002","10003","0"};/*ѧ��*//*ѧ�ղ�����ʹ*/
+	char *name[1001]={"0","Zhang","Yang","Liang","0"};/*����*/
+	int f[1001]={0,11,12,11};/*�༶*/
+	float c[1001]={0,99.5,77.9,92.5},d[1001]={0,88.5,56.5,99.0},e[1001]={0,89.5,87.5,60.5};/*�ɼ�*/
+	float g[1001]={0};/*�ܳɼ�*/
+    sign1=change(b,name,f,c,d,e,g,3);
+    for(i=1;i<=3;i++)
+	g[i]=c[i]+d[i]+e[i];
+	sortclass(b,name,f,c,d,e,g,n);
+	k=1;/*ǰ��*/
+	for(i=1;i<=n;i++)
+	{
+	if(f[i+1]!=f[k])
+	{
+	sortexam(b,name,f,c,d,e,g,k,i);
+	k=i+1;
+}
+}
+print(b,name,f,c,d,e,g,n,sign1);
+return 0;
+}