随机产生若干个0~100的随机数，从键盘输入待输入的随机数的个数，并求和、平均值、最大值、最小值、并统计小于60的随机数的个数,如果结果为小数，要求小数点后面保留两位有效数字。-Randomly generating a plurality of random numbers of 0 to 100, to be entered from the keyboard to enter the number of the random number, and sum, average, maximu

词法分析器,将程序中的单词\符号\数字等进行分析-Lexical analyzer, the program word \ symbols \ figures were analyzed

表达式语法分析，输入表达式（数字以i代替），分析其合法性，并作适当报错功能-Expression syntax analysis, enter the expression (figures i substitute), analyze its legitimacy, and to make appropriate error function