There are a number of students playing table tennis. Any two students will play a game. A total of 28 games will be played. How many students will participate in the game?
有若干名同学进行乒乓球比赛，任意两人名同学都进行一场比赛，一共比赛了28场，那么参加比赛的同学一共有多少人．
<result>8</result>