1 files changed, 35 insertions, 0 deletions
diff --git a/examples/manual/expr.lex b/examples/manual/expr.lex
new file mode 100644
index 0000000..9adfcaa
--- /dev/null
+++ b/examples/manual/expr.lex
@@ -0,0 +1,35 @@
+/*
+ * expr.lex : Scanner for a simple
+ *            expression parser.
+ */
+
+%{
+#include "y.tab.h"
+
+%}
+
+%%
+
+[0-9]+     { yylval.val = atol(yytext);
+             return(NUMBER);
+           }
+[0-9]+\.[0-9]+ { 
+             sscanf(yytext,"%f",&yylval.val);
+             return(NUMBER);
+           }
+"+"        return(PLUS);
+"-"        return(MINUS);
+"*"        return(MULT);
+"/"        return(DIV);
+"^"        return(EXPON);
+"("        return(LB);
+")"        return(RB);
+\n         return(EOL);
+[\t ]*     /* throw away whitespace */
+.          { yyerror("Illegal character"); 
+             return(EOL);
+           }
+%%
+
+
+