Ошибка c4996 c getch

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;

class Piano 
{
//Member variables
private:
string notes;
//Member functions
 public:
//default constructor
Piano() {
notes = "";
}
void LoadNotes(string mynotes.txt)
{
char note;
ifstream input_file(mynotes.txt);
return;

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int main()
{
  //and it should contain your variable:
   Piano p;
   //and you can use that:
   p.LoadNotes("file");
}

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;

class Piano {
    //Member variables
private:
    string notes;
    //Member functions
public:
    //default constructor
    Piano() {
        notes = "";
    }
    //Load notes from file
    void LoadNotes(string mynotes.txt)
    {
        char note;
        ifstream input_file(mynotes.txt);
        return;
    }

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void LoadNotes(string filename)
{
    ifstream input_file(filename);
    // ...
}

// ...

int main()
{
   Piano p; // borrowing from jonnin's post
   p.LoadNotes("mynotes.txt");
}

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;

class Piano 
{
    //Member variables
private:
    string notes;
    //Member functions
public:
    //default constructor
    Piano();
}
        notes = "";
        {
            //Load notes from file
            void LoadNotes(string filename)
        }
        char note;
        ifstream input_file(filename);

int main()
{
    Piano p;
   p.LoadNotes("filenmae");
}

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// Example program
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

class Piano 
{
private:
    string notes;

public:
    void LoadNotes(string filename)
    {
        //Load notes from file
        ifstream input_file(filename);
        
        if (!input_file)
        {
            cout << "Error reading filen";
            return;
        }

        //
        // ... read from input_file here ...
        //
    }
};

int main()
{
    Piano p;
    p.LoadNotes("filename.txt");
}

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;

class Piano 
{
    //Member variables
private:
    string notes;
    //Member functions
public:
    //default constructor
    Piano();
} // E0065 expected a ';'
// The definition of class must end with ;
// This closing brace matches the opening brace on line 8 

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class Piano
{
private:
    string notes;

public:
    void LoadNotes(string filename)
    {
        //Load notes from file
        ifstream input_file(filename);

        if (!input_file)
        {
            cout << "Error reading filen";
            return;
        }

        //
        // ... read from input_file here ...
        //
    }
};

int main()
{
    Piano p;
    p.LoadNotes("filename");
}

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace std;

int main(int argc, char *argv[])
{
  while(true){
              cout<<"Input note: ";
              char note = getch();
              
              
              //do re mi fa sol la si do re mi fa sol
              if(note == 'a'){
                      Beep(261,100);
                      }
              if(note == 's'){
                      Beep(293,100);
                      }
              if(note == 'd'){
                      Beep(329,100);
                      }
              if(note == 'f'){
                      Beep(349,100);
                      }
              if(note == 'g'){
                      Beep(392,100);
                      }
              if(note == 'h'){
                      Beep(440,100);
                      }
              if(note == 'j'){
                      Beep(493,100);
                      }                      
              if(note == 'k'){
                      Beep(523,100);
                      }                      
              if(note == 'l'){
                      Beep(587,100);
                      }
              if(note == ';'){
                      Beep(659,100);
                      }  
              if(note == '''){
                      Beep(698,100);
                      } 
               if(note == '\'){
                      Beep(784,100);
                      } 
                      
               //rebemol mibemol solbemol labemol sibemol rebemol mibemol solbemol
               if(note == 'w'){
                      Beep(277,100);
                      } 
                      if(note == 'e'){
                      Beep(311,100);
                      }
                      if(note == 't'){
                      Beep(370,100);
                      }
                      if(note == 'y'){
                      Beep(415,100);
                      }
                      if(note == 'u'){
                      Beep(466,100);
                      }
                      if(note == 'o'){
                      Beep(554,100);
                      }
                      if(note == 'p'){
                      Beep(622,100);
                      }
                      if(note == ']'){
                      Beep(740,100);
                      }     
                      
            system("cls");          
}  
    
    return EXIT_SUCCESS;
} 

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#include <cstdlib>   // EXIT_SUCCESS, system
#include <iostream>  // std::cout
#include <string>    // std::string
#include <fstream    // std::ifstream
#include <conio.h>   // getch or _getch
#include <windows.h> // Beep 

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#include <cstdlib>
#include <iostream>
#include <conio.h>
#include <windows.h>
#include<fstream>
using namespace std;
//Create a class Piano
class Piano {
	//Member variables
private:
	string notes;
	//Member functions
public:
	//default constructor
	Piano() {
		notes = "";
	}
	//Load notes from file
	void LoadNotes(string filename) {
		char note;
		ifstream input_file(filename);
		if (!input_file.is_open()) {
			cerr << "Could not open the file - '"
				<< filename << "'" << endl;
			return;
		}
		while (input_file.get(note)) {
			notes += note;
		}
		input_file.close();
	}
	//Play notes
	void PlayNotes() {
		for (const auto& note : notes) {
			if (note == 'a') {
				Beep(261, 100);
			}
			if (note == 's') {
				Beep(293, 100);
			}
			if (note == 'd') {
				Beep(329, 100);
			}
			if (note == 'f') {
				Beep(349, 100);
			}
			if (note == 'g') {
				Beep(392, 100);
			}
			if (note == 'h') {
				Beep(440, 100);
			}
			if (note == 'j') {
				Beep(493, 100);
			}
			if (note == 'k') {
				Beep(523, 100);
			}
			if (note == 'l') {
				Beep(587, 100);
			}
			if (note == ';') {
				Beep(659, 100);
			}
			if (note == ''') {
				Beep(698, 100);
			}
			if (note == '\') {
				Beep(784, 100);
			}
			//rebemol mibemol solbemol labemol sibemol rebemol mibemol solbemol
			if (note == 'w') {
				Beep(277, 100);
			}
			if (note == 'e') {
				Beep(311, 100);
			}
			if (note == 't') {
				Beep(370, 100);
			}
			if (note == 'y') {
				Beep(415, 100);
			}
			if (note == 'u') {
				Beep(466, 100);
			}
			if (note == 'o') {
				Beep(554, 100);
			}
			if (note == 'p') {
				Beep(622, 100);
			}
			if (note == ']') {
				Beep(740, 100);
			}
		}
	}
};
int main(int argc, char* argv[])
{
	//Create object
	Piano mypiano;
	//Load notes from file
	mypiano.LoadNotes("mynotes.txt");
	//Play
	mypiano.PlayNotes();
	return EXIT_SUCCESS;
}