test.lex

词法分析器自动生成工具。 the lexcal is generated

%{
int cc[5] = {0,0,0,0,0} ; /* 五种单词符号计数 */ 
%}
%%
\+          {cc[3]++;}
\-          {cc[3]++; }
":="        { cc[4]++;}
\,          { cc[4]++;}
\;          { cc[4]++;}
VAR|var     {cc[1]++; }
READ|read    {cc[1]++; }
[a-zA-Z][a-zA-Z0-9]*    {cc[0]++; }
[0-9][0-9]*   {cc[2]++; }
end. { printf("\nident:%5d\treserved:%5d\tnumber:%5d\toperator:%5d\tseparator:%5d",cc[0],cc[1],cc[2],cc[3],cc[4]); }
%%