實驗源代碼
//Warshall.cpp #include<stdio.h> void warshall(int k,int n) { int i , j, t; int temp[20][20]; for(int a=0;a<k;a++) { printf("請輸入矩陣第%d 行元素:",a); for(int b=0;b<n;b++) { scanf ("%d",&temp[a][b]); } } for(i=0;i<k;i++){ for( j=0;j<k;j++){ if(temp[ j][i]==1) { for(t=0;t<n;t++) { temp[ j][t]=temp[i][t]||temp[ j][t]; } } } } printf("可傳遞閉包關系矩陣是:\n"); for(i=0;i<k;i++) { for( j=0;j<n;j++) { printf("%d", temp[i][ j]); } printf("\n"); } } void main() { printf("利用 Warshall 算法求二元關系的可傳遞閉包\n"); void warshall(int,int); int k , n; printf("請輸入矩陣的行數 i: "); scanf("%d",&k);
四川大學實驗報告 printf("請輸入矩陣的列數 j: "); scanf("%d",&n); warshall(k,n); }
標簽:
warshall
離散
實驗
上傳時間:
2016-06-27
上傳用戶:梁雪文以
asp實現限制一個ip只能訪問一次的方法
<%
'/////////////////////////////////////////////////////
'// //
'//作用:一個IP地址只允許訪問本頁一次 //
'//引用:<!-- #include file="Check_Ip.asp" --> //
'// //
'/////////////////////////////////////////////////////
'Response.Charset = 936 '設置輸出編碼為簡體中文
'Response.Buffer = false '關閉緩沖區
Dim Fso,ts,IpList,Cfs
'設置Cookies函數
Function SetCookie()
Response.Cookies("IsBrow") = "Brow"
Response.Cookies("IsBrow").Expires = Date+365
End Function
'記錄IP地址函數
Function WriteIp(FileName, IpAddress)
Set Fso = Server.CreateObject("Scripting.FileSystemObject")
Set ts = Fso.OpenTextFile(Server.MapPath(FileName),8,true)
ts.WriteLine IpAddress
ts.Close
Set ts = Nothing
Set Fso = Nothing
End Function
'讀取IP地址函數
Function ReadIpList(FileName)
Set Fso = Server.CreateObject("Scripting.FileSystemObject")
If Not Fso.FileExists(Server.MapPath(FileName)) Then
CreateFile("Iplist.txt")
Exit Function
End If
Set ts = Fso.OpenTextFile(Server.MapPath(FileName))
Iplist = ts.ReadAll
ts.Close
Set ts = Nothing
Set Fso = Nothing
ReadIpList = Iplist
End Function
'創建文件函數
Function CreateFile(FileName)
Set Fso = Server.CreateObject("Scripting.FileSystemObject")
Set Cfs = Fso.CreateTextFile(Server.MapPath(FileName))
Cfs.Close
Set Cfs = Nothing
Set Fso = Nothing
End Function
'關閉當前IE窗口函數(注:IE6下通過,其他瀏覽器未測試)
Function CloseWindow()
'Response.Write "<script>window.location='javascript:window.opener=null;window.close();'</script>"
Response.Redirect "http://www.baidu.com"
End Function
Ip = Request.ServerVariables("REMOTE_ADDR") '獲取瀏覽者IP地址
Cookie = Request.Cookies("IsBrow") '獲取當前Cookies
'Response.Write Cookie
If Request.ServerVariables("HTTP_X_FORWARDED_FOR") <> "" Then
Response.Write "本站不允許使用代理訪問"
Response.End()
Else
If Cookie = "Brow" Then
CloseWindow()
Else
If Instr(ReadIpList("Iplist.txt"),Ip) <>0 Then
CloseWindow()
Else
WriteIp "Iplist.txt" , Ip
End If
SetCookie()
End If
End If
%>
標簽:
asp
訪問
上傳時間:
2016-07-14
上傳用戶:helei0915