设计SAMPLE语言的词法分析器



启动程序后，先输出作者姓名、班级、学号（可用汉语、英语或拼音）；

b)　　请求输入测试程序名，键入程序名后自动开始词法分析并输出结果；

c)　　输出结果为单词的二元式序列（样式见样板输出1和2）；

d)　　要求能发现下列词法错误和指出错误性质和位置：

非法字符，即不是SAMPLE字符集的符号；

字符常数缺右边的单引号（字符常数要求左、右边用单引号界定，不能跨行）；

注释部分缺右边的界符*/（注释要求左右边分别用/*和*/界定，不能跨行

-a) After starting the program, the first output of the author s name, class, student number (available in Chinese, English or Pinyin)

b) a request to enter the test program name, type the program name automatically start after lexical analysis and output

c) The output is a word binary sequence (see template styles outputs 1 and 2)

d) requirements can be found in the following lexical errors and indicate the nature and location of the error:

Illegal characters, that is, not SAMPLE symbol character set

Character constant lack of the right single quotation mark (character constant requests left and right single quotation marks to define, can not cross)

Comment section missing on the right delimiter*/(left and right side, respectively, note the requirements with the /* and*/define, can not cross