diff -ru qcl-0.6.3/Makefile qcl-0.6.3_mod/Makefile
--- qcl-0.6.3/Makefile	2006-12-14 20:34:18.000000000 +0900
+++ qcl-0.6.3_mod/Makefile	2008-10-18 13:51:35.000000000 +0900
@@ -39,8 +39,8 @@
 #
 # Comment out if you don't have GNU libplotter and X
 
-PLOPT = -DQCL_PLOT
-PLLIB = -L/usr/X11/lib -lplotter
+#PLOPT = -DQCL_PLOT
+#PLLIB = -L/usr/X11/lib -lplotter
 
 # Readline support
 #
diff -ru qcl-0.6.3/exec.cc qcl-0.6.3_mod/exec.cc
--- qcl-0.6.3/exec.cc	2006-12-14 20:34:18.000000000 +0900
+++ qcl-0.6.3_mod/exec.cc	2008-10-18 14:14:19.000000000 +0900
@@ -325,7 +325,9 @@
   m+=" ";
   while(1) {
     e=0;
-    s=qclinput("? "+m)+"\n";
+    s=qclinput("");
+    if(s[s.size()-1]=='\n')s=s.substr(0,s.size()-1);
+    //s=qclinput("? "+m)+"\n";
     switch(pvar->basetype()) {
       case tINTEGER:
         if(sscanf(s.c_str(),"%d",&n)==1) v=tValue((tInt)n);
@@ -357,9 +359,12 @@
   string ostr;
   tValue v;
   TRACE();
+  bool first=true;
   for_plist(p,plist,c) {
     EVAL(v,p);
-    ostr+=v.str()+" ";
+    if (!first) ostr+=" ";
+    ostr+=v.str();
+    first=false;
   }
   qclprint(ostr);
   qcllog(": "+ostr+"\n");
diff -ru qcl-0.6.3/format.cc qcl-0.6.3_mod/format.cc
--- qcl-0.6.3/format.cc	2006-12-14 20:34:18.000000000 +0900
+++ qcl-0.6.3_mod/format.cc	2008-10-18 13:54:05.000000000 +0900
@@ -36,8 +36,12 @@
   "\n",			// error_end
   "! ",			// msg_beg
   "\n",			// msg_end
+  "",			// print_beg
+  "\n",			// print_end
+  /*
   ": ",			// print_beg
   "\n",			// print_end
+  */
   "",			// prompt_beg
   "",			// prompt_end
   "",			// ps_beg
diff -ru qcl-0.6.3/options.cc qcl-0.6.3_mod/options.cc
--- qcl-0.6.3/options.cc	2006-12-14 20:34:18.000000000 +0900
+++ qcl-0.6.3_mod/options.cc	2008-10-18 13:51:13.000000000 +0900
@@ -14,6 +14,7 @@
 
 
 #include <stdio.h>
+#include <string.h>
 #include <time.h>
 
 #include "options.h"