游戏程序能实现以下功能:

游戏初始时随机生成10道50以内加减法运算题，供游戏参与者解答。

每道题游戏参与者有三次机会输入答案。输入正确答案，随机显示评价结果；输入错误答案，提示重新输入（连续三次输错后，输出正确答案）。

本游戏可计分。每题10分，第一次答对的10分，第二次答对的7分，第三次答对的5分，否则不得分。游戏结束时显示游戏参与者得分。-Game program to achieve the following features: The game randomly generates the initial 10 operations add and subtract within 50 title game for the participants to answer. Every title game participants have three chances to enter the answer. Enter the correct answer, random displays of evaluation findings　entered the wrong answer, you are prompted to re-input (three consecutive mismatched, the output of the correct answer). This game could be a points system. 10 points for every question, the first correct answer 10 points, the second correct answer of 7 points, third correct answers to five points, unless sub. The game is over when you display the game score players.