我使用cmake构建的OpenCV和ITK库开发了C ++程序。程序（xxx.cpp文件）具有3个类和一个主要功能（用于输入和显示输出）。
之后，我创建了一个Windows窗体应用程序以从GUI接受输入。它产生两个文件MainForm.h和MainForm.cpp。
我是C ++的初学者，从未使用C ++创建GUI应用程序。我希望将我的外部.cpp文件包含在GUI中，以便单击按钮即可调用（xxx.cpp）文件中的函数。我按照此链接中描述的步骤操作：https://mcn-www.jwu.ac.jp/~yokamoto/openwww/vsg/OpenCV/
问题是我无法从外部xxx.cpp文件中找到调用函数的解决方案。我尝试将代码复制到MainForm.cpp，但是发生了错误。请指导我遵循正确的程序。谢谢。
MainForm.h文件：
#pragma once
#include "MainForm.cpp"
namespace GUIProj {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
/// <summary>
/// Summary for MainForm
/// </summary>
public ref class MainForm : public System::Windows::Forms::Form
{
public:
MainForm(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~MainForm()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Button^ button1;
protected:
protected:
protected:
private: System::Windows::Forms::Button^ button2;
private: AxWMPLib::AxWindowsMediaPlayer^ axWindowsMediaPlayer1;
private: AxWMPLib::AxWindowsMediaPlayer^ axWindowsMediaPlayer2;
private: System::Windows::Forms::OpenFileDialog^ openFileDialog1;
private: System::Windows::Forms::OpenFileDialog^ openFileDialog2;
private: System::Windows::Forms::PictureBox^ pictureBox1;
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
System::ComponentModel::ComponentResourceManager^ resources = (gcnew System::ComponentModel::ComponentResourceManager(MainForm::typeid));
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->openFileDialog1 = (gcnew System::Windows::Forms::OpenFileDialog());
this->openFileDialog2 = (gcnew System::Windows::Forms::OpenFileDialog());
this->axWindowsMediaPlayer2 = (gcnew AxWMPLib::AxWindowsMediaPlayer());
this->axWindowsMediaPlayer1 = (gcnew AxWMPLib::AxWindowsMediaPlayer());
this->pictureBox1 = (gcnew System::Windows::Forms::PictureBox());
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->axWindowsMediaPlayer2))->BeginInit();
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->axWindowsMediaPlayer1))->BeginInit();
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->BeginInit();
this->SuspendLayout();
//
// button1
//
this->button1->Location = System::Drawing::Point(105, 257);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(75, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"Video 1";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &MainForm::button1_Click);
//
// button2
//
this->button2->Location = System::Drawing::Point(381, 257);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(75, 23);
this->button2->TabIndex = 1;
this->button2->Text = L"Video 2";
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &MainForm::button2_Click);
//
// openFileDialog1
//
this->openFileDialog1->FileName = L"openFileDialog1";
//
// openFileDialog2
//
this->openFileDialog2->FileName = L"openFileDialog2";
//
// axWindowsMediaPlayer2
//
this->axWindowsMediaPlayer2->Enabled = true;
this->axWindowsMediaPlayer2->Location = System::Drawing::Point(287, 29);
this->axWindowsMediaPlayer2->Name = L"axWindowsMediaPlayer2";
this->axWindowsMediaPlayer2->OcxState = (cli::safe_cast<System::Windows::Forms::AxHost::State^>(resources->GetObject(L"axWindowsMediaPlayer2.OcxState")));
this->axWindowsMediaPlayer2->Size = System::Drawing::Size(265, 201);
this->axWindowsMediaPlayer2->TabIndex = 3;
//
// axWindowsMediaPlayer1
//
this->axWindowsMediaPlayer1->Enabled = true;
this->axWindowsMediaPlayer1->Location = System::Drawing::Point(12, 29);
this->axWindowsMediaPlayer1->Name = L"axWindowsMediaPlayer1";
this->axWindowsMediaPlayer1->OcxState = (cli::safe_cast<System::Windows::Forms::AxHost::State^>(resources->GetObject(L"axWindowsMediaPlayer1.OcxState")));
this->axWindowsMediaPlayer1->Size = System::Drawing::Size(257, 201);
this->axWindowsMediaPlayer1->TabIndex = 2;
//
// pictureBox1
//
this->pictureBox1->Location = System::Drawing::Point(649, 29);
this->pictureBox1->Name = L"pictureBox1";
this->pictureBox1->Size = System::Drawing::Size(219, 409);
this->pictureBox1->TabIndex = 4;
this->pictureBox1->TabStop = false;
this->pictureBox1->Click += gcnew System::EventHandler(this, &MainForm::pictureBox1_Click);
//
// MainForm
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(928, 419);
this->Controls->Add(this->pictureBox1);
this->Controls->Add(this->axWindowsMediaPlayer2);
this->Controls->Add(this->axWindowsMediaPlayer1);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Name = L"MainForm";
this->Text = L"MainForm";
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->axWindowsMediaPlayer2))->EndInit();
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->axWindowsMediaPlayer1))->EndInit();
(cli::safe_cast<System::ComponentModel::ISupportInitialize^>(this->pictureBox1))->EndInit();
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
openFileDialog1->ShowDialog();
axWindowsMediaPlayer1->URL = openFileDialog1->FileName;
}
private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {
openFileDialog2->ShowDialog();
axWindowsMediaPlayer2->URL = openFileDialog1->FileName;
}
private: System::Void pictureBox1_Click(System::Object^ sender, System::EventArgs^ e) {
}
};
}
MainForm.cpp文件：
#include "MainForm.h"
using namespace System;
using namespace System::Windows::Forms;
[STAThreadAttribute]
void Main(array<String^>^ args)
{
Application::EnableVisualStyles(); Application::SetCompatibleTextRenderingDefault(false); GUIProj::MainForm form; Application::Run(%form);
}
xxx.cpp文件：
class A{
// methods
}
class B{
//methods
}
class C{
//methods
}
int main{
// take inputs and call methods of above classes
}
您需要将xxx.cpp分为定义.h和实现.cpp文件。有关如何执行此操作的一些材料：
一旦有了单独的xxx.h文件，请在#include中将其保存在MainForm.h中，并从xxx中的pictureBox1_Click中调用方法。这样可以避免重复的定义错误。