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在Qt中,经常使用qDebug()<<"Hello World";的方式往控制台打印一些输出,以便观察程序的运行情况。
在Java中(eclipse、myeclipse中),经常使用的是System.out.println("Hello World");的方式。
在Android中,经常使用的是Log.d("Hello World");
. . .
在C#的时候,使用的是Console.WriteLine("Hello World");
开发winform的时候,需要先往主函数所在的源文件中加入以下内容。
引入库:
using System.Runtime.InteropServices;
在Main()前,添加:
[DllImport("kernel32.dll")]
public static extern bool AllocConsole();
[DllImport("kernel32.dll")]
static extern bool FreeConsole();
在Main()中,第一行添加:
AllocConsole();
在Main()中,最后一行添加:
FreeConsole();
示例:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
// 控制台输出,需加入此库
using System.Runtime.InteropServices;
namespace HelloWorld_WindowsForm
{
static class Program
{
[DllImport("kernel32.dll")]
public static extern bool AllocConsole();
[DllImport("kernel32.dll")]
static extern bool FreeConsole();
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
// 允许调用控制台输出
AllocConsole();
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new LoginPage());
// 释放
FreeConsole();
}
}
}
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