46 lines
1.5 KiB
C++
Executable File
46 lines
1.5 KiB
C++
Executable File
// =====================================================================================================================
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// open-cpp-utils, an open-source cpp library with data structures that extend the STL.
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// Copyright (C) 2024 Medusa Slockbower
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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// =====================================================================================================================
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#ifndef OPEN_CPP_UTILS_MATH_H
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#define OPEN_CPP_UTILS_MATH_H
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#include <cmath>
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namespace open_cpp_utils
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{
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template<typename T>
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bool is_prime(T x)
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{
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if(x <= 1) return false;
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if(x == 2 || x == 3) return true;
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if(x % 2 == 0 || x % 3 == 0) return false;
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T limit = static_cast<T>(sqrt(x));
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for(T i = 5; i <= limit; i += 6)
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{
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if(x % i == 0 || x % (i + 2) == 0) return false;
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}
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return true;
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}
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}
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#endif // OPEN_CPP_UTILS_MATH_H
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