diff --git a/6.cpp b/6.cpp
new file mode 100644
index 0000000..dca16e9
--- /dev/null
+++ b/6.cpp
@@ -0,0 +1,103 @@
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+void input();
+void select1();
+void order();
+void output();
+int sum=2;
+int flag;
+struct stu
+{
+	int Id;
+	int clas;
+	char name[100];
+	float score1;
+	float score2;
+	float score3;
+	float score;
+}stu[100]={{10001,11,"Zhang",99.5,88.5,89.5,277.5},
+{10002,12,"Yang",77.9,56.5,87.5,221.9},
+{10003,11,"Liang",92.5,99.0,60.5,252}};
+int main()
+{
+	while(1)
+	{
+		input();
+		order();
+		output();
+
+	}
+}
+void input()
+{
+	sum=sum+1;
+	scanf("%d",&stu[sum].Id);
+	flag=stu[sum].Id;
+	scanf("%d",&stu[sum].clas);
+	scanf("%s",&stu[sum].name);
+	scanf("%f",&stu[sum].score1);
+	scanf("%f",&stu[sum].score2);
+	scanf("%f",&stu[sum].score3);
+	stu[sum].score=stu[sum].score3+stu[sum].score2+stu[sum].score1;
+	select1();
+}
+void select1()
+{
+	int k;
+	for(int i=0;i<=sum-1;i++)
+	{
+		if(stu[i].Id==flag)
+		{
+			k=i;
+		}
+	}
+	for(int j=k;j<=sum;j++)
+	{
+		stu[j]=stu[j+1];
+	}
+	sum=sum-1;
+}
+void order()
+{
+	for(int i=0;i<=sum;i++)
+	{
+		for(int j=i;j<=sum;j++)
+		{
+			if(stu[i].clas>stu[j].clas)
+			{
+				stu[sum+1]=stu[i];
+				stu[i]=stu[j];
+				stu[j]=stu[sum+1];
+			}
+			else if(stu[i].clas==stu[j].clas)
+			{
+				if(stu[i].score<stu[j].score)
+				{
+					stu[sum+1]=stu[i];
+					stu[i]=stu[j];
+					stu[j]=stu[sum+1];
+				}
+			}
+		}
+	}
+}
+void output()
+{
+	printf("%d %d %s %.1f %.1f %.1f",stu[0].clas,stu[0].Id,stu[0].name,stu[0].score1,stu[0].score2,stu[0].score3);
+	for(int i=1;i<=sum;i++)
+	{
+		if(stu[i].clas==stu[i-1].clas)
+		{
+			printf(" modified");
+			printf("\n");
+			printf("   %d %s %.1f %.1f %.1f",stu[i].Id,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);
+		}
+		else 
+		{
+			printf("\n"); 
+			printf("%d %d %s %.1f %.1f %.1f \n",stu[i].clas,stu[i].Id,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);
+		}
+	}
+}