X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=check%2Fexam_differentiation.cpp;h=8f739ff448a1b1b297458bdb163f4c98c53b1828;hp=d2015822d308a25e305e8265ae65e098700fd9d7;hb=ba8a13307a3b0761fcf5187edecc408975c308a6;hpb=ae3044935ddf13dd325f6e11770357b99bbe6095

diff --git a/check/exam_differentiation.cpp b/check/exam_differentiation.cpp
index d2015822..8f739ff4 100644
--- a/check/exam_differentiation.cpp
+++ b/check/exam_differentiation.cpp
@@ -3,7 +3,7 @@
  *  Tests for symbolic differentiation, including various functions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2003 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
@@ -26,7 +26,7 @@ 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(ex(0)) != 0) {
+	if (!(ed - d).is_zero()) {
 		switch (nth) {
 		case 0:
 			clog << "zeroth ";
@@ -45,9 +45,7 @@ static unsigned check_diff(const ex &e, const symbol &x,
 		clog << "derivative of " << e << " by " << x << " returned "
 		     << ed << " instead of " << d << endl;
 		clog << "returned:" << endl;
-		ed.printtree(clog);
-		clog << endl << "instead of" << endl;
-		d.printtree(clog);
+		clog << tree << ed << "instead of\n" << d << dflt;
 
 		return 1;
 	}
@@ -55,7 +53,7 @@ static unsigned check_diff(const ex &e, const symbol &x,
 }
 
 // Simple (expanded) polynomials
-static unsigned exam_differentiation1(void)
+static unsigned exam_differentiation1()
 {
 	unsigned result = 0;
 	symbol x("x"), y("y");
@@ -86,7 +84,7 @@ static unsigned exam_differentiation1(void)
 }
 
 // Trigonometric functions
-static unsigned exam_differentiation2(void)
+static unsigned exam_differentiation2()
 {
 	unsigned result = 0;
 	symbol x("x"), y("y"), a("a"), b("b");
@@ -135,7 +133,7 @@ static unsigned exam_differentiation2(void)
 }
 	
 // exp function
-static unsigned exam_differentiation3(void)
+static unsigned exam_differentiation3()
 {
 	unsigned result = 0;
 	symbol x("x"), y("y"), a("a"), b("b");
@@ -163,7 +161,7 @@ static unsigned exam_differentiation3(void)
 }
 
 // log functions
-static unsigned exam_differentiation4(void)
+static unsigned exam_differentiation4()
 {
 	unsigned result = 0;
 	symbol x("x"), y("y"), a("a"), b("b");
@@ -193,7 +191,7 @@ static unsigned exam_differentiation4(void)
 }
 
 // Functions with two variables
-static unsigned exam_differentiation5(void)
+static unsigned exam_differentiation5()
 {
 	unsigned result = 0;
 	symbol x("x"), y("y"), a("a"), b("b");
@@ -214,7 +212,7 @@ static unsigned exam_differentiation5(void)
 }
 
 // Series
-static unsigned exam_differentiation6(void)
+static unsigned exam_differentiation6()
 {
 	symbol x("x");
 	ex e, d, ed;
@@ -225,7 +223,7 @@ static unsigned exam_differentiation6(void)
 	ed = series_to_poly(ed);
 	d = series_to_poly(d);
 	
-	if ((ed - d).compare(ex(0)) != 0) {
+	if (!(ed - d).is_zero()) {
 		clog << "derivative of " << e << " by " << x << " returned "
 		     << ed << " instead of " << d << ")" << endl;
 		return 1;
@@ -234,7 +232,7 @@ static unsigned exam_differentiation6(void)
 }
 
 // Hashing can help a lot, if differentiation is done cleverly
-static unsigned exam_differentiation7(void)
+static unsigned exam_differentiation7()
 {
 	symbol x("x");
 	ex P = x + pow(x,3);
@@ -257,7 +255,7 @@ static unsigned exam_differentiation7(void)
 	return 0;
 }
 
-unsigned exam_differentiation(void)
+unsigned exam_differentiation()
 {
 	unsigned result = 0;