law & order

1 files changed, 21 insertions, 0 deletions

diff --git a/07/main.l b/07/main.l
new file mode 100644
index 0000000..2f98161
--- /dev/null
+++ b/07/main.l
@@ -0,0 +1,21 @@
+%{
+extern int yylval;
+%}
+
+%%
+[0-9]+ {
+    yylval = atoi(yytext);
+    return NUM;
+}
+"+" return ADD;;
+"-" return SUB;
+"*" return MUL;
+"/" return DIV;
+"(" return LPAR;
+")" return RPAR;
+\n return 0;
+%%
+
+int yywrap() {
+    return 1;
+}