Premier exercice

lexical/flux.l

@@ -0,0 +1,34 @@
+%option noyywrap
+
+%{
+enum { T_INT = 1, T_CHAR = 2 };
+union {
+	int i;
+	char c;
+} data; 
+%}
+
+DIG	[0-9]
+
+%%
+
+{DIG}+	{ data.i = atoi(yytext); return T_INT; }
+[+*()]	{ data.c = *yytext; return T_CHAR; }
+[ \n]   { /* ignore */ }
+
+%%
+
+int main (int argc, char **argv)
+{
+	int token;
+	if (argc > 1) yyin = fopen(argv[1],"r");
+	while (token = yylex())
+	{
+		switch(token)
+		{
+		  	case T_INT: printf("int(%d)  ",data.i); break;
+		  	case T_CHAR: printf("'%c'  ",data.c); break;
+		}
+	}
+	puts("");
+}