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Changed to avoid using namespace boost::math

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[SVN r65665]
This commit is contained in:
Paul A. Bristow
2010-09-29 10:32:55 +00:00
parent 7050b81300
commit be4bd91753
15 changed files with 98 additions and 175 deletions
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30
example/error_handling_example.cpp
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@@ -1,6 +1,6 @@
// example_error_handling.cpp
// Copyright Paul A. Bristow 2007.
// Copyright Paul A. Bristow 2007, 2010.
// Copyright John Maddock 2007.
// Use, modification and distribution are subject to the
@@ -11,6 +11,11 @@
// Note that this file contains quickbook markup as well as code
// and comments, don't change any of the special comment markups!
// Optional macro definitions described in text below:
// #define BOOST_MATH_DOMAIN_ERROR_POLICY ignore_error
// #define BOOST_MATH_DOMAIN_ERROR_POLICY errno_on_error
// #define BOOST_MATH_DOMAIN_ERROR_POLICY is set to: throw_on_error
//[error_handling_example
/*`
The following example demonstrates the effect of
@@ -59,11 +64,9 @@ We'll begin our sample program with the needed includes:
using std::exception;
/*`
Next we'll define the program's main() to call the student's t
distribution with an invalid degrees of freedom parameter, the program
is set up to handle either an exception or a NaN:
distribution with an invalid degrees of freedom parameter,
the program is set up to handle either an exception or a NaN:
*/
int main()
@@ -77,14 +80,17 @@ int main()
try
{
errno = 0;
students_t dist(degrees_of_freedom); // exception is thrown here if enabled
errno = 0; // Clear/reset.
students_t dist(degrees_of_freedom); // exception is thrown here if enabled.
double p = cdf(dist, t);
// test for error reported by other means:
// Test for error reported by other means:
if((boost::math::isnan)(p))
{
cout << "cdf returned a NaN!" << endl;
cout << "errno is set to: " << errno << endl;
if (errno != 0)
{ // So errno has been set.
cout << "errno is set to: " << errno << endl;
}
}
else
cout << "Probability of Student's t is " << p << endl;
@@ -94,14 +100,13 @@ int main()
std::cout <<
"\n""Message from thrown exception was:\n " << e.what() << std::endl;
}
return 0;
} // int main()
/*`
Here's what the program output looks like with a default build
(one that does throw exceptions):
(one that *does throw exceptions*):
[pre
Example error handling using Student's t function.
@@ -122,14 +127,13 @@ Now the program output is:
Example error handling using Student's t function.
BOOST_MATH_DOMAIN_ERROR_POLICY is set to: ignore_error
cdf returned a NaN!
errno is set to: 0
]
And finally let's build with:
#define BOOST_MATH_DOMAIN_ERROR_POLICY errno_on_error
Which gives the output:
Which gives the output show errno:
[pre
Example error handling using Student's t function.