随机出10道题（加法、减法、乘法、除法），由学生解答，10道完成后给出成绩及评语。要求加法、减法、乘法、除法各设计一个函数。参数为两个数据，返回解答结果（对为1，错为0）。-Random out of 10 questions (addition, subtraction, multiplication, division), by students to answer, given after completion of 10 grades and comments. Requires addition, subtraction, multiplication, division a function of the design. Parameters for the two data, and return to answer the result (of 1, 0 wrong).