10-2

#include<iostream.h>

void main ()
{

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

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

	if (tedad)
		miyangin = majmoo / tedad;
	else miyangin = 0;
	cout << "tedad=" << tedad 
		<< " miyangin=" << miyangin << endl;
}