double var1;
		double var2;
		double var3;

		string op;
		void ScreenTextChanged(object sender, EventArgs e)
		{

		}
		void Tipka0Click(object sender, EventArgs e)
		{
			screen.Text+="0";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka1Click(object sender, EventArgs e)
		{
			screen.Text+="1";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka2Click(object sender, EventArgs e)
		{
			screen.Text+="2";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka3Click(object sender, EventArgs e)
		{
			screen.Text+="3";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka4Click(object sender, EventArgs e)
		{
			screen.Text+="4";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka5Click(object sender, EventArgs e)
		{
			screen.Text+="5";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka6Click(object sender, EventArgs e)
		{
			screen.Text+="6";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka7Click(object sender, EventArgs e)
		{
			screen.Text+="7";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka8Click(object sender, EventArgs e)
		{
			screen.Text+="8";
			var1=Convert.ToDouble(screen.Text);
		}

		void Tipka9Click(object sender, EventArgs e)
		{
			screen.Text+="9";
			var1=Convert.ToDouble(screen.Text);
		}

		void MnozenjeClick(object sender, EventArgs e)
		{
			var2=var1;
			op=screen.Text="*";
			screen.Text="";
		}

		void ZbrajanjeClick(object sender, EventArgs e)
		{
			var2=var1;
			op=screen.Text="+";
			screen.Text="+";
		}

		void OduzimanjeClick(object sender, EventArgs e)
		{
			var2=var1;
			op=screen.Text="-";
			screen.Text="";
		}

		void DjeljenjeClick(object sender, EventArgs e)
		{
			var2=var1;
			op=screen.Text="/";
			screen.Text="";
		}
		void KvadriranjeClick(object sender, EventArgs e)
		{
			var2=var1;
			op=screen.Text="x^2";
			screen.Text="x^2";
		}