--- loncom/homework/caparesponse/caparesponse.c	2004/11/16 23:37:40	1.14
+++ loncom/homework/caparesponse/caparesponse.c	2005/02/15 22:15:05	1.17
@@ -1,6 +1,6 @@
 /* The LearningOnline Network with CAPA 
  * CAPA wrapper code
- * $Id: caparesponse.c,v 1.14 2004/11/16 23:37:40 albertel Exp $
+ * $Id: caparesponse.c,v 1.17 2005/02/15 22:15:05 albertel Exp $
  *
  * Copyright Michigan State University Board of Trustees
  *
@@ -110,7 +110,10 @@ int caparesponse_capa_check_answer(char
   }
   if (unit_str != NULL && unit_str[0]!='\0') {
     strncpy(p.unit_str,unit_str,ANSWER_STRING_LENG-1);
-    p.ans_unit   = u_parse_unit(unit_str);
+    //p.ans_unit = u_parse_unit(unit_str);
+    p.ans_unit   = parse_unit_expr(unit_str);
+    p.ans_unit   = process_utree(p.ans_unit);
+    //print_unit_t(p.ans_unit);
   } else {
     p.unit_str[0]='\0';
     p.ans_unit=NULL;
@@ -130,7 +133,8 @@ int caparesponse_get_real_response (char
   //double caparesponse_get_real_response (char* unit_str, char* answer) {
   int     input_len,all_alphabet,idx,outcome,result;
   double  n_part,scale=1.0,given,target;
-  char    input[ANSWER_STRING_LENG],filename[FILE_NAME_LENGTH];
+  char    input[ANSWER_STRING_LENG],filename[FILE_NAME_LENGTH],
+    tmp_unit_str[ANSWER_STRING_LENG];
   Unit_t *ans_unit;
   long    seed1,seed2;
   FILE   *fp;
@@ -143,7 +147,8 @@ int caparesponse_get_real_response (char
   fclose(fp);
 
   if (unit_str != NULL && unit_str[0]!='\0') {
-    ans_unit   = u_parse_unit(unit_str);
+    ans_unit   = parse_unit_expr(unit_str);
+    ans_unit   = process_utree(ans_unit);
   } else {
     ans_unit=NULL;
   }
@@ -155,10 +160,11 @@ int caparesponse_get_real_response (char
     }
   }
   if( !all_alphabet ) {
-    outcome = split_num_unit(answer,&n_part,input,unit_str);
+    tmp_unit_str[0]=NULL;
+    outcome = split_num_unit(answer,&n_part,input,tmp_unit_str);
     if( outcome > 1 ) { /* with both num and unit parts or only unit part */
       if( ans_unit != NULL ) {
-	result = check_correct_unit(unit_str,ans_unit,&scale);
+	result = check_correct_unit(tmp_unit_str,ans_unit,&scale);
       } else {
 	/* what to do when no unit is specified but student entered a unit? */
 	result = UNIT_NOTNEEDED;