merge_run2

void Merge_run2(ifstream &a, ifstream &b, ofstream &f)
{
	int sl1, sl2;
	int keyA, keyB;
	a >> sl1;
	b >> sl2;

	while (!eor)
	{
		if (sl1 < sl2)
		{
			f << sl1;
			a >> keyA;
			if (a.eof())
				eor = true;
			else
			eor = sl1 > keyA;
			sl1 = keyA;
			if (eor)
			{
				do
				{
					f << sl2 << " ";
					b >> keyB;
					if (b.eof())
						eor = true;
					else
					{
						eor = sl2 > keyB;
						sl2 = keyB;
					}

				} while (!eor);

			}

		}
		else
		{
			f << sl2;
			b >> keyB;
			if (b.eof())
				eor = true;
			else
				eor = sl2 > keyB;
			sl2 = keyB;
			if (eor)
			{
				do
				{
					f << sl1 << " ";
					a >> keyA;
					if (b.eof())
						eor = true;
					else
					{
						eor = sl1 > keyA;
						sl1 = keyA;
					}

				} while (!eor);
			}
		}
	}