a question on classes

[new_in_c++]

i just learned that i could write classes to a file using the function fwrite(). (defined in stdio)

and i was wondering if i could write the whole class in one of its own functions, perhaps something like this:

#include <stdio.h>

class dot{
private:
	int x;
	int y;
	wchar_t* title;
public:
	void tofile(void);
///some other unnecessary functions///
};

void dot::tofile(void)
{
	FILE* file;
file=fopen("dotfile.dat","w+");
fwrite(&dot,sizeof(dot),1,file);    ///this is where i am not sure of
fclose(file);
}