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void Socket::enable()
{	
	if(on == false)
	{
		digitalWrite(pin, LOW);
		on = true;
		std::cout << "Socket enabled!" << std::endl;
 
		//save to disk
		std::ofstream onF;
		onF.open("Socket" + std::to_string(this->id) + ".txt");
 
		if(onF.is_open())
		{
			onF << true << std::endl;
			onF.close();
		}
 
		return;
	}
	else if(on == true)
	{
		std::cout << "Socket already enabled." << std::endl;
		return;
	}
}

prog.cpp:1:6: error: 'Socket' has not been declared
 void Socket::enable()
      ^
prog.cpp: In function 'void enable()':
prog.cpp:3:5: error: 'on' was not declared in this scope
  if(on == false)
     ^
prog.cpp:5:16: error: 'pin' was not declared in this scope
   digitalWrite(pin, LOW);
                ^
prog.cpp:5:21: error: 'LOW' was not declared in this scope
   digitalWrite(pin, LOW);
                     ^
prog.cpp:5:24: error: 'digitalWrite' was not declared in this scope
   digitalWrite(pin, LOW);
                        ^
prog.cpp:7:3: error: 'cout' is not a member of 'std'
   std::cout << "Socket enabled!" << std::endl;
   ^
prog.cpp:7:37: error: 'endl' is not a member of 'std'
   std::cout << "Socket enabled!" << std::endl;
                                     ^
prog.cpp:10:3: error: 'ofstream' is not a member of 'std'
   std::ofstream onF;
   ^
prog.cpp:11:3: error: 'onF' was not declared in this scope
   onF.open("Socket" + std::to_string(this->id) + ".txt");
   ^
prog.cpp:11:23: error: 'to_string' is not a member of 'std'
   onF.open("Socket" + std::to_string(this->id) + ".txt");
                       ^
prog.cpp:11:38: error: invalid use of 'this' in non-member function
   onF.open("Socket" + std::to_string(this->id) + ".txt");
                                      ^
prog.cpp:15:19: error: 'endl' is not a member of 'std'
    onF << true << std::endl;
                   ^
prog.cpp:23:3: error: 'cout' is not a member of 'std'
   std::cout << "Socket already enabled." << std::endl;
   ^
prog.cpp:23:45: error: 'endl' is not a member of 'std'
   std::cout << "Socket already enabled." << std::endl;
                                             ^

Standard output is empty