**r8lib_test**,
a C++ code which
calls r8lib(), which contains utility routines for "R8" or
"double precision real" arithmetic.

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r8lib, a C++ code which contains many utility routines using double precision real (r8) arithmetic.

- r8lib_test.cpp, the calling program;
- r8lib_test.sh, runs all the tests;
- r8lib_test.txt, the output file.