i need help making this code work

[inbugable]

#include "stdafx.h"


int _tmain(int argc, _TCHAR* argv[])
{//variable names
	int Int1, Int2, Int3, sum, average, product;
	//takes user input
	printf("input three different integers: ");
	scanf("%d%d%d", &Int1,&Int2,&Int3);

	//equation process
	sum = Int1 + Int2 + Int3;
	average = sum / 3;
	product = Int1 * Int2 * Int3;
	cout<<"Enter Int1 : ";
	cin>>Int1;
	cout<<"Enter Int2 : ";
	cin>>Int2;
	cout<<"Enter Int3 : ";
	cin>>Int3;

	if(Int1>=Int2)
	{
		if(Int1>=Int3)
		{
			cout<<"Largest Number Is : "<<Int1;
			if(Int2<=Int3)
				cout<<"Smallest Number Is : "<<Int2;
			else
				cout<<"Smallest Number Is : "<<Int3;
		}
		else
		{
			cout<<"Largest Number Is : "<<Int3;
			cout<<"Smallest Number Is : "<<Int2;
		}
	}
	else
	{
		if(Int2>=Int3)
		{
			cout<<"Largest Number Is : "<<Int2;
			if(Int1<=Int3)
				cout<<"Smallest Number Is : "<<Int1;
			else
				cout<<"Smallest Number Is : "<<Int3;
		}
		else
		{
			cout<<"Largest Number Is : "<<Int3;
			cout<<"Smallest Number Is : "<<Int1;
		}
	}

	//prints results
	printf("Sum is %d\nAverage is %d\nProduct is %d\n", sum, average, product);


	return 0;
}

im trying to make it so it tells me the smallest and largest of the 3 integers but i keep getting the following error:
error C2065: 'cout' : undeclared identifier
error C2065: 'cin' : undeclared identifier

what do i do