tweaked the lexer to always have DEBUG of 0 and updated .tok file logic in runner

runner.c

@@ -28,6 +28,12 @@ int main(int argc, char *argv[]) {
         }
     }
 
+    if (yyin != NULL) {
+        fclose(yyin);
+    }
+    if (output != NULL && arg == TOK_ARG) {
+        fclose(output);
+    }
     return 0;
 }
 
@@ -40,21 +46,20 @@ char *is_tok(int argc, char *argv[]) {
             return INVALID_ARG;
         }
 
-        int ignore_path = 0;
-        int count_since_slash = 0;
-        for (int i = 0; i < file_len; i++) {
-            count_since_slash++;
-            if (input_prog[i] == '/') {
-                ignore_path += count_since_slash;
-                count_since_slash = 0;
-            }
+        const char *basename = input_prog;
+        const char *slash = strrchr(input_prog, '/');
+        if (slash != NULL) {
+            basename = slash + 1;
         }
+
+        // Calculate lengths
+        int basename_len = strlen(basename);
+        char* FILE_tok = calloc(basename_len - ALPHA_OFFSET + TOK_LEN + 1, sizeof(char));
+        
+        // Copy filename and add .tok extension
+        strncpy(FILE_tok, basename, basename_len - ALPHA_OFFSET);
+        strcat(FILE_tok, ".tok");
         
-        file_len -= ignore_path;
-        input_prog += ignore_path;
-        char* FILE_tok = calloc(sizeof(char), file_len - ALPHA_OFFSET + TOK_LEN);
-        strncpy(FILE_tok, input_prog, file_len - ALPHA_OFFSET); //copy name of prog before .alpha
-        strcpy(FILE_tok + sizeof(char) * (file_len - ALPHA_OFFSET), ".tok"); //add .tok to end of file name
         return FILE_tok;
     }
     return CHECK_OTHER;