游戏规则：先点击按钮，让系统出个4位数字随机数，每一位都不重复，然后用户来猜，每猜一次，系统会告知猜的结果XAYB，A表示数字正确，位置也正确；B表示数字正确，位置不正确。例如，系统告知1A2B，表示你猜对3个数字，其中1个数字的位置猜正确，2个数字的位置不正确。直到你猜的结果为4A0B，才表示完全正确。看你最终需要几次能够猜出该4位随机数。一般而言，6次以内猜出的都有运气成分，6~8次猜出的是高智商。加油哦！-Rules of the game: first click on the button and let the system out of a 4 digit random number, not every repetition, then the user to guess, guess each time, the system will inform the result guess XAYB, A represents a number is correct, the location is correct　B represents a number is correct, the position is not correct. For example, the system inform 1A2B, said you guessed three digits, including a position to guess the correct figures, two figures are not positioned correctly. Until the results of your guess is 4A0B, it means fully correct. See you eventually need to be able to guess that four times a random number. In general, there are six times less guess luck, 6 to 8 times guess is IQ. Come on!