制作一个可供小学数学运算的程序，要求能计算0——100正数加减乘除四则运算，如结果为小数四舍五入保留小数点后两位，根据输入题数出题，题目应为随机，每次应不一样。-Production of an alternative elementary school math program requirements can calculate the positive number of 0- 100 Math four operations, such as results decimal rounde

计算机随机出题。求两位数的加减乘除。共10题，每题10分。当10题做完时，可以选择交卷或修改。-Computer random out of question. Seeking double-digit addition and subtraction, multiplication and division. A total of 10 questions, each question 10 points. When the 10 questions done, you can an ass