我正在设置一个警报类型调用,让我知道我的程序运行时间是否超过10分钟我希望程序在发送警报或信号后继续运行.我以为我可以执行以下代码,但程序会在运行时间达到十分钟时停止.
eval{
local $SIG{ALRM} = sub { die "alarm\n"; };
alarm (600);
--code---
alarm 0;
};
if($@){
print "\Its been ten minutes\n";
}
我希望应用程序通知我但继续运行.
我在 Visual Studio 2013 中运行它。
因为Application.Current.Shutdown我得到：
'Application' is an ambiguous reference between 'System.Windows.Application' and 'System.Windows.Forms.Application'。
我尝试使用using SystemInformation = System.Windows.Forms.SystemInformation;代替using System.Windows.Forms作为一个网站的建议，但出现错误：
The type or namespace name 'OpenFileDialog' could not be found (are you missing a using directive or an assembly reference?)对于线OpenFileDialog dlg = new OpenFileDialog();
我该如何修复它以便我可以使用 OpenFileDialog？我想要出现一个打开文件对话框。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Forms;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using …什么是std::pairC++ 的C等价物？我试图在网上找到相同的东西,除了解释它的作用之外什么都找不到.
我正在尝试安装Time::Out.
该错误看起来来自tar文件.我还需要安装更多东西吗？我得到以下内容:
install Time::Out
Reading 'C:\Perl\cpan\Metadata'
Database was generated on Thu, 05 Jun 2014 08:53:02 GMT
Running install for module 'Time::Out'
Checksum for C:\Perl\cpan\sources\authors\id\P\PA\PATL\Time-Out-0.11.tar.gz ok
Scanning cache C:\Perl/cpan/build for sizes
............................................................................DONE
Time-Out-0.11/
Time-Out-0.11/MANIFEST
Time-Out-0.11/t/
Time-Out-0.11/t/01_init.t
Time-Out-0.11/t/pod.t
Time-Out-0.11/t/03_exceptions.t
Time-Out-0.11/t/02_usage.t
Time-Out-0.11/Out.pod
Time-Out-0.11/README
Time-Out-0.11/Out.pm
Time-Out-0.11/META.yml
Time-Out-0.11/Makefile.PL
Time-Out-0.11/Changes
Configuring P/PA/PATL/Time-Out-0.11.tar.gz with Makefile.PL
Set up gcc environment - 3.4.5 (mingw-vista special r3)
Checking if your kit is complete...
Looks good
Generating a dmake-style Makefile
Writing Makefile for Time::Out
Writing MYMETA.yml and MYMETA.json
PATL/Time-Out-0.11.tar.gz …我的foreach循环不能按照我的意愿工作.我希望它循环遍历数组,并找到一个元素存在的时间和元素不存在的时间.但是,我得到了所有人的说法Not an apple.
@fruit = ('apple','orange','pear');
foreach(@fruit){
if(@fruit != 'apple'){
print "Not an apple\n";
}
else{
print "Is an apple\n";
}
}