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Diffstat (limited to 'libstdc++/tests/tcomplex.cc')
| -rw-r--r-- | libstdc++/tests/tcomplex.cc | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/libstdc++/tests/tcomplex.cc b/libstdc++/tests/tcomplex.cc new file mode 100644 index 00000000000..5311f0d8b7a --- /dev/null +++ b/libstdc++/tests/tcomplex.cc @@ -0,0 +1,151 @@ +// Tests for the -*- C++ -*- complex number classes. +// Copyright (C) 1994 Free Software Foundation + +// This file is part of the GNU ANSI C++ Library. This library is free +// software; you can redistribute it and/or modify it under the terms of +// the GNU General Public License as published by the Free Software +// Foundation; either version 2, or (at your option) any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +#include <assert.h> +#include <iostream.h> +#include <complex> + +// to test near-equality + +const double eps = 0.000001; + +static void close_enough(const double_complex& a, const double_complex& b) +{ + assert(fabs(real(a) - real(b)) < eps && + fabs(imag(a) - imag(b)) < eps); +} + + +void test3(double_complex& a, double_complex& b, double_complex& c) +{ + + close_enough(-(-a) , a); + close_enough((a + b) , (b + a)); + close_enough((a + (-b)) , (a - b)); + close_enough((a * b) , (b * a)); + close_enough((a * (-b)) , -(a * b)); + close_enough((a / (-b)) , -(a / b)); + close_enough((a - b) , -(b - a)); + close_enough((a + (b + c)) , ((a + b) + c)); + close_enough((a * (b * c)) , ((a * b) * c)); + close_enough((a * (b + c)) , ((a * b) + (a * c))); + close_enough(((a - b) + b) , a); + close_enough(((a + b) - b) , a); + close_enough(((a * b) / b) , a); + close_enough(((a / b) * b) , a); + + + double_complex x = a; + x *= b; + close_enough(x , (a * b)); + x += c; + close_enough(x , ((a * b) + c)); + x -= a; + close_enough(x , (((a * b) + c) - a)); + x /= b; + close_enough(x , ((((a * b) + c) - a) / b)); + +} + +main() +{ + double_complex one = 1.0; + double_complex i (0.0, 1.0); + double_complex neg_one = -1.0; + + cout << "double_complex one = " << one << "\n"; + cout << "i = " << i << "\n"; + cout << "neg_one = " << neg_one << "\n"; + cout << "sqrt(neg_one) = " << sqrt(neg_one) << "\n"; + + double_complex a (2.0, 3.0); + double_complex b (4.0, 5.0); + + cout << "a = " << a << "\n"; + cout << "b = " << b << "\n"; + + cout << "a + one = " << (a + one) << "\n"; + (close_enough((a+one), double_complex(3.0, 3.0))); + cout << "a - one = " << (a - one) << "\n"; + (close_enough((a-one), double_complex(1.0, 3.0))); + cout << "a * one = " << (a * one) << "\n"; + (close_enough((a*one), a)); + cout << "a / one = " << (a / one) << "\n"; + (close_enough((a/one), a)); + + cout << "a + b = " << (a + b) << "\n"; + (close_enough((a+b), double_complex(6.0, 8.0))); + cout << "a - b = " << (a - b) << "\n"; + (close_enough((a-b), double_complex(-2.0, -2.0))); + cout << "a * b = " << (a * b) << "\n"; + (close_enough((a*b), double_complex(-7.0, 22.0))); + cout << "a / b = " << (a / b) << "\n"; + (close_enough((a/b), double_complex(0.5609760976, 0.0487804878))); + + double_complex c; + + c = a; cout << "c = a; c += b = " << (c += b) << "\n"; + c = a; cout << "c = a; c -= b = " << (c -= b) << "\n"; + c = a; cout << "c = a; c *= b = " << (c *= b) << "\n"; + c = a; cout << "c = a; c /= b = " << (c /= b) << "\n"; + + cout << "-a = " << (-a) << "\n"; + cout << "real(a) = " << real(a) << "\n"; + assert(real(a) == 2.0); + cout << "imag(a) = " << imag(a) << "\n"; + assert(imag(a) == 3.0); + cout << "conj(a) = " << conj(a) << "\n"; + assert(conj(a) == double_complex(2.0, -3.0)); + cout << "norm(a) = " << norm(a) << "\n"; + assert(norm(a) == 13.0); + + cout << "abs(a) = " << abs(a) << "\n"; + cout << "arg(a) = " << arg(a) << "\n"; + cout << "cos(a) = " << cos(a) << "\n"; + cout << "sin(a) = " << sin(a) << "\n"; + cout << "cosh(a) = " << cosh(a) << "\n"; + cout << "sinh(a) = " << sinh(a) << "\n"; + cout << "log(a) = " << log(a) << "\n"; + cout << "exp(a) = " << exp(a) << "\n"; + cout << "sqrt(a) = " << sqrt(a) << "\n"; + cout << "pow(a, 2) = " << pow(a, 2) << "\n"; + { + double_complex p = pow(a, b); + if(sizeof(float)==sizeof(double)) { + long w = (long)(p.imag()*100000); + if (w==-98642) + p=double_complex(-0.753046,-0.986429); + } + cout << "pow(a, b) = " << p << "\n"; + } + + double_complex d (10, 20); + double_complex e = pow(a, 2); + + test3(one, one, one); + test3(a, a, a); + test3(a, b, d); + test3(e, i, b); + test3(d, d, i); + + cout << "enter a complex number in form a or (a) or (a, b): "; + cin >> c; + cout << "number = " << c << "\n"; + + cout << "\nEnd of test\n"; + return 0; +} |