X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=check%2Fexam_differentiation.cpp;h=ccb97dab9a8926c55598585ffd683ec5ffb36028;hp=33b13b1f05d3ccee9e82094d9425fc88b8505a23;hb=96af2609db413ddf70371e0423e6c07ecb5ee813;hpb=68fdf425abf14d016d5f95ee7b9d06a19a3c5926 diff --git a/check/exam_differentiation.cpp b/check/exam_differentiation.cpp index 33b13b1f..ccb97dab 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) 1999-2003 Johannes Gutenberg University Mainz, Germany + * GiNaC Copyright (C) 1999-2004 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 "; @@ -223,7 +223,7 @@ static unsigned exam_differentiation6() 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;