visual C++ fstream error

Question

首先，我是硬件编程人员（HDL，uC编程），几天前我的老板问我在Visual C++中创建了一个用于控制uC的接口。我以前从未使用过Visual C++，而且我的软件编程技能最好是中级。但是，我只有到周二才能使界面工作，因此我不得不寻找示例，并根据我的时间框架执行相同的操作。所以请原谅我，如果我问任何明显和愚蠢的问题。

在我的代码中，我必须将存储在数组中的值移动到CSV文件中。所以我必须使用逗号分隔我的值... 但是，为了创建一个CSV文件，我必须使用fstream（据我所知，迄今为止我已经了解）。 每当我使用

#include <fstream> 

我得到一个巨大的错误，如量：

1>c:\program files (x86)\microsoft visual studio 10.0\vc\include\codeanalysis\sourceannotations.h(244): error C3083: 'vc_attributes': the symbol to the left of a '::' must be a type 
1>c:\program files (x86)\microsoft visual studio 10.0\vc\include\codeanalysis\sourceannotations.h(244): error C2039: 'YesNoMaybe' : is not a member of '`global namespace'' 

这里是我的代码fstream的相关休息：

using namespace System; 
using namespace System::ComponentModel; 
using namespace System::Collections; 
using namespace System::Windows::Forms; 
using namespace System::Data; 
using namespace System::Drawing; 
using namespace System::IO::Ports; 
#include <iostream> 
#include <fstream> 

     std::ofstream myfile; 
      myfile.open("Data.txt"); 
      //find available ports 
      private: void findports(void){ 
         array<Object^>^ objectArray = SerialPort::GetPortNames(); 
         this->comboBox4->Items->AddRange(objectArray); 
         array<String ^>^h = gcnew array<String ^>(24); 
         for(int i=0; i<=23; i++){ 
          h[i]= String::Concat(i.ToString()); 
         } 
         this->comboBox1->Items->AddRange(h); 
          array<String ^>^m = gcnew array<String ^>(60); 
         for(int i=0; i<=59; i++){ 
          m[i]= String::Concat(i.ToString()); 
         } 
         this->comboBox3->Items->AddRange(m); 
          array<String ^>^s = gcnew array<String ^>(24); 
         for(int i=0; i<=23; i++){ 
          s[i]= String::Concat(i.ToString()); 
         } 
         this->comboBox5->Items->AddRange(s); 
          array<String ^>^d = gcnew array<String ^>(366); 
         for(int i=0; i<=365; i++){ 
          d[i]= String::Concat(i.ToString()); 
         } 
         this->comboBox2->Items->AddRange(d); 
        } 








     private: System::Void label1_Click(System::Object^ sender, System::EventArgs^ e) { 
       } 
     private: System::Void label2_Click(System::Object^ sender, System::EventArgs^ e) { 
       } 
    private: System::Void label4_Click(System::Object^ sender, System::EventArgs^ e) { 
      } 
    private: System::Void label5_Click(System::Object^ sender, System::EventArgs^ e) { 
      } 
    private: System::Void label6_Click(System::Object^ sender, System::EventArgs^ e) { 
      } 
    private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) { 

       if((this->comboBox4->Text == String::Empty)||(this->textBox1->Text == String::Empty)||(this->textBox2->Text == String::Empty)){ 
        this->textBox1->Text="missing port settings"; 
        this->textBox2->Text="missing port settings"; 
       } 
       else{ // start assigning 
        try{ // first make sure port isn't busy/open 
         if(!this->serialPort1->IsOpen){ 
          // select the port whose name is in comboBox4 (select port) 
          this->serialPort1->PortName=this->comboBox4->Text; 
          //open the port 
          this->serialPort1->Open(); 


          // sending 
          String^ name_ = this->serialPort1->PortName; 
          String^ sampling_period_ = this->comboBox5->Text; 

          String^ days_ = this->comboBox2->Text; 

          String^ hours_ = this->comboBox3->Text; 

          String^ minutes_ = this->comboBox1->Text; 

          String^ start_ = this->textBox1->Text; 

          String^ end_ = this->textBox2->Text; 

          //send data to setup timer on the microcontroller 
          this->serialPort1->WriteLine(sampling_period_); 
          this->serialPort1->WriteLine(days_); 
          this->serialPort1->WriteLine(hours_); 
          this->serialPort1->WriteLine(minutes_); 
          // send slave addresses 
          this->serialPort1->WriteLine(start_); 
          this->serialPort1->WriteLine(end_); 


          // receiving 
          int rec[100][8]; 
          for (int i=0;i<sizeof(rec[0]);i++){ 
           for (int j=0;j<sizeof(rec);j++){ 
            rec[i][j]=int::Parse(this->serialPort1->ReadLine()); 
           } 
          } 
          myfile<<"ADC1"<<","<<"ADC2"<<","<<"ADC3"<<","<<"ADC4"<<","<<"ADC5"<<","<<"ADC6"<<","<<"ADC7"<<","<<"ADC8"<<endl; 
          for (int i=0;i<sizeof(rec[0]);i++){ 
           for (int j=0;j<sizeof(rec);j++){ 
            myfile<<rec[i][j]<<","; 
           } 
           myfile<<endl; 
          } 



         } 
         else{ 
          this->textBox1->Text="Warning: port is busy or isn't open"; 
          this->textBox2->Text="Warning: port is busy or isn't open"; 
         } 
        } 
         catch(UnauthorizedAccessException^){ 
          this->textBox1->Text="Unauthorized access"; 
          this->textBox2->Text="Unauthorized access"; 
         } 
        } 

      } 
    private: System::Void textBox1_TextChanged(System::Object^ sender, System::EventArgs^ e) { 
      } 
    private: System::Void label7_Click(System::Object^ sender, System::EventArgs^ e) { 
      } 
    private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) { 

      } 
    private: System::Void label8_Click(System::Object^ sender, System::EventArgs^ e) { 
      } 
    }; 
    } 

我希望能得到一些帮助或至少在这里有用的信息。

在此先感谢。

Answer 1

#include <fstream> 
std::ofstream myfile; 
    myfile.open("Data.txt"); 

最后一行是一个语句，它只能出现在函数内部，而不是在命名空间内（即任何函数体外），为你写它。

44): error C3083: 'vc_attributes': the symbol to the left of a '::' must be a type 
1>c:\program files (x86)\microsoft visual studio 10.0\vc\include\codeanalysis\sourceannotations.h(244): error C2039: 'YesNoMaybe' : is not a member of '`global namespace'' 

此错误不可能来自你显示的代码，其中没有提到vc_attribtues或YesNoMaybe。如果您将代码简化到显示问题所需的最低限度，并发布与代码匹配的错误，您将得到更好的答案。

我不确定你期望从sizeof(rec)得到什么，但它可能不是你想要的。