diff --git a/7.cpp b/7.cpp
deleted file mode 100644
index c5d083b..0000000
--- a/7.cpp
+++ /dev/null
@@ -1,175 +0,0 @@
-#include <stdio.h>
-#include <time.h>
-#include <stdlib.h>
-#include <string.h>
-void a1();
-void a2();
-void a3();
-void a4();
-void a5();
-void menu();
-int sum=7;
-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},
-{10004,11,"Cai",89.6,56.9,90.5},
-{10005,14,"Fu",55.6,67.9,98.9},
-{10006,12,"Mao",22.1,45.9,99.2},
-{10007,13,"Zhan",35.6,67.9,88.0}};
-int main()
-{
-	while(1)
-	{
-		menu();
-	}
-}
-void menu()
-{
-	int t;
-	scanf("%d",&t);
-	switch(t)
-	{
-		case 1:a1();break;
-		case 2:a2();break;
-		case 3:a3();break;
-		case 4:a4();break;
-		case 5:a5();break;
-	}	
-}
-void a1()
-{
-	char b[1000];
-	int x1=0,x2=0,len,i=0;
-	gets(b);
-	len=strlen(b);
-	while(b[i]!='-')
-	{
-		i=i+1;
-	}
-	for(int j=1;j<i;j++)
-	{
-		x1=x1*10+b[j]-'0';
-	}
-	for(int j=i+1;j<len;j++)
-	{
-		x2=x2*10+b[j]-'0';
-	}
-	for(int k=x1;k<=x2;k++)
-	{
-		for(int j=0;j<sum;j++)
-		{
-			if(stu[j].clas==k)
-			{
-				printf("%d %d %s %.1f %.1f %.1f\n",stu[j].Id,stu[j].clas,stu[j].name,stu[j].score1,stu[j].score2,stu[j].score3);
-			}
-		}
-	}
-}
-void a2()
-{
-	char b[1000];
-	int x1=0,x2=0,len,i=0;
-	gets(b);
-	len=strlen(b);
-	while(b[i]!='-')
-	{
-		i=i+1;
-	}
-	for(int j=1;j<i;j++)
-	{
-		x1=x1*10+b[j]-'0';
-	}
-	for(int j=i+1;j<len;j++)
-	{
-		x2=x2*10+b[j]-'0';
-	}
-	for(int k=x1;k<=x2;k++)
-	{
-		for(int j=0;j<sum;j++)
-		{
-			if(stu[j].Id==k)
-			{
-				printf("%d %d %s %.1f %.1f %.1f\n",stu[j].Id,stu[j].clas,stu[j].name,stu[j].score1,stu[j].score2,stu[j].score3);
-			}
-		}
-	}
-}
-void a3()
-{
-	char b[100];
-	int len,f;
-	gets(b);
-	len=strlen(b)-1;
-	for(int i=0;i<sum;i++)
-	{
-		f=1;
-		for(int j=1;j<len;j++)
-		{
-			if(stu[i].name[j-1]!=b[j])
-			{
-				f=0;
-			}
-		}
-		if(f==1)
-		{
-			printf("%d %d %s %.1f %.1f %.1f\n",stu[i].Id,stu[i].clas,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);
-		}
-	}
-}
-void a4()
-{
-	int a;
-	scanf("%d",&a);
-	for(int i=0;i<sum;i++)
-	{
-		if(stu[i].score1+stu[i].score2+stu[i].score3>a)printf("%d %d %s %.1f %.1f %.1f\n",stu[i].Id,stu[i].clas,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);
-	}
-}
-void a5()
-{
-	char b[1000];
-	int x1=0,x2=0,x3=0,len,t,i=0;
-	gets(b);
-	len=strlen(b);
-	while(b[i]!='.')
-	{
-		i=i+1;
-	}
-	t=i+1;
-	for(int j=1;j<i;j++)
-	{
-		x1=x1*10+b[j]-'0';
-	}
-	while(b[i]!='-')
-	{
-		i=i+1;
-	}
-	for(int j=t;j<i;j++)
-	{
-		x2=x2*10+b[j]-'0';
-	}
-	for(int j=i+1;j<len;j++)
-	{
-		x3=x3*10+b[j]-'0';
-	}
-	for(int k=x2;k<=x3;k++)
-	{
-		for(int j=0;j<sum;j++)
-		{
-			if(stu[j].Id==k&&stu[j].clas==x1)
-			{
-				printf("%d %d %s %.1f %.1f %.1f\n",stu[j].Id,stu[j].clas,stu[j].name,stu[j].score1,stu[j].score2,stu[j].score3);
-			}
-		}
-	}
-	
-}