8-4

#include<iostream.h>

void main ()
{

	int tedad = 0;
	double nomre=0, majmoo=0, miyangin;

	while (nomre >= -0.000001) { 
		// barraye har daaneshjoo, nomre
		//bepors, jam raa hessab kon
		cout << "nomreye # " << tedad+1 << " vared konid:";
		cin >> nomre;
		if (nomre > -0.0000001) {
			majmoo += nomre;
			tedad++;
		}
	}

	miyangin = majmoo / tedad;
	cout << "tedad=" << tedad 
		<< " miyangin=" << miyangin << endl;

}