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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

This commit is contained in:
Arash Partow 2015-01-05 06:27:56 +11:00
parent 752e1d6410
commit 7715a906f3
1 changed files with 57 additions and 0 deletions
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57
exprtk_test.cpp
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@ -6286,6 +6286,63 @@ inline bool run_test19()
} }
{
symbol_table_t symbol_table;
symbol_table.add_constants();
std::string expression_str =
" var sieve[10^7] := [false]; "
" var m := trunc(sqrt(sieve[])); "
" "
" sieve[0] := true; "
" sieve[1] := true; "
" "
" for (var i := 0; i <= m; i += 1) "
" { "
" if (false == sieve[i]) "
" { "
" for (var j := (i * i); j < sieve[]; j += i) "
" { "
" sieve[j] := true; "
" } "
" } "
" }; "
" "
" var prime_count := 0; "
" for (var i := 0; i < sieve[]; i += 1) "
" { "
" if (false == sieve[i]) "
" { "
" prime_count += 1; "
" }; "
" }; "
" "
" prime_count == 664579; ";
expression_t expression;
expression.register_symbol_table(symbol_table);
parser_t parser;
if (!parser.compile(expression_str,expression))
{
printf("run_test19() - Error: %s Expression: %s\n",
parser.error().c_str(),
expression_str.c_str());
return false;
}
if (T(1) != expression.value())
{
printf("run_test19() - Prime Sieve Computation Error");
return false;
}
}
return true; return true;
} }