Thread: infinite loop

why does the following code gets stuck in an infinite loop in the second pass through the while loop?? I know its got something to do with the input buffer, cause it works when I use fflush(stdin) but I can't understand what's wrong. Also I need to know why std::cout.flush() does not seem to be working..

Code:

#include <iostream>
#include <fstream>

int main()
{
	std::ofstream file;
	file.open("file.dat",std::ios::trunc|std::ios::binary);
	if(!file)
		std::cout<<"unable to open for output";

	struct record
	{
		char code[6];
		char name[20];
		int i;
	};

	record r;
	int a = 0;

	while(1)
	{
		std::cout<<"Record " << a + 1 << std::endl;
		std::cout<<"Enter character code, name and an int \n";
		std::cin.getline(r.code,6);
		std::cout.flush();
		std::cin.getline(r.name,20);
		std::cout.flush();
		std::cin>>r.i;
		std::cout.flush();
		file.write((char *)&r,sizeof(r));
		std::cout<<"\nAdd another (y\\n) : ";
		char c;
		std::cin>>c;
		std::cout.flush();
		if(c == 'n')
			break;
		a++;
		std::cout<<'\n'<<'\n';
	}
	file.close();
}