sysrap/tests/SRngTest.cc

0001 // name=SRngTest ; gcc $name.cc -std=c++11 -lstdc++ -I.. -o /tmp/$name && /tmp/$name
0002 #include <iostream>
0003 #include <iomanip>
0004 #include <functional>
0005 #include "SRng.hh"
0006
0007 template <typename T> void test_rng( const std::function<T()>& fn )
0008 {
0009     T a ;
0010     T b ;
0011     bool done ;
0012     unsigned count = 0 ;
0013
0014     do {
0015         a = fn() ;
0016         b = fn() ;
0017
0018         std::cout
0019             << " count " << std::setw(10) <<  count
0020             << " a " << std::fixed << std::setw(10) << std::setprecision(4) <<  a
0021             << " b " << std::fixed << std::setw(10) << std::setprecision(4) <<  b
0022             << std::endl
0023             ;
0024
0025         done = a > 0.99 && b > 0.99 ;
0026         count += 1 ;
0027
0028     } while( done == false ) ;
0029
0030
0031     std::cout
0032         << " result "
0033         << " count " << count
0034         << " a " << a
0035         << " b " << b
0036         << std::endl
0037         ;
0038 }
0039
0040
0041 void test_rng_0()
0042 {
0043     unsigned seed = 1u ;
0044     SRng<double> rng0(seed) ;
0045     test_rng<double>(rng0);
0046 }
0047
0048 void test_rng_1()
0049 {
0050     unsigned seed = 1u ;
0051     SRng<float> rng1(seed) ;
0052     test_rng<float>(rng1);
0053 }
0054
0055
0056 int main(int argc, char** argv)
0057 {
0058     //test_rng_0();
0059     test_rng_1();
0060     return 0;
0061 }
0062
0063
0064