- changed dates in copyright notices

[ginac.git] / check / differentiation.cpp

diff --git a/check/differentiation.cpp b/check/differentiation.cpp
index 348b5fd5bd2121c6853f5cdacc2d6412726fae58..d5fda588164ab990fa2d17d7222475e97c53b63c 100644 (file)
--- a/check/differentiation.cpp
+++ b/check/differentiation.cpp
@@ -3,7 +3,7 @@
  *  Tests for symbolic differentiation, including various functions. */
 
 /*
- *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -30,7 +30,7 @@ static unsigned check_diff(const ex &e, const symbol &x,
                            const ex &d, unsigned nth=1)
 {
     ex ed = e.diff(x, nth);
-    if ((ed - d).compare(exZERO()) != 0) {
+    if ((ed - d).compare(ex(0)) != 0) {
         switch (nth) {
         case 0:
             clog << "zeroth ";
@@ -258,13 +258,13 @@ static unsigned differentiation6(void)
     symbol x("x");
     ex e, d, ed;
     
-    e = sin(x).series(x, exZERO(), 8);
-    d = cos(x).series(x, exZERO(), 7);
+    e = sin(x).series(x, 0, 8);
+    d = cos(x).series(x, 0, 7);
     ed = e.diff(x);
     ed = static_cast<series *>(ed.bp)->convert_to_poly();
     d = static_cast<series *>(d.bp)->convert_to_poly();
     
-    if ((ed - d).compare(exZERO()) != 0) {
+    if ((ed - d).compare(ex(0)) != 0) {
         clog << "derivative of " << e << " by " << x << " returned "
              << ed << " instead of " << d << ")" << endl;
         return 1;