48 lines
2.2 KiB
C++
48 lines
2.2 KiB
C++
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// fig13_07.cpp
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// Standard library set class template.
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#include <algorithm>
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#include <fmt/format.h> // C++20: This will be #include <format>
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#include <iostream>
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#include <iterator> // ostream_iterator
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#include <set>
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int main() {
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std::set doubles{2.1, 4.2, 9.5, 2.1, 3.7}; // CTAD
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std::ostream_iterator<double> output{std::cout, " "};
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std::cout << "doubles contains: ";
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std::ranges::copy(doubles, output);
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// insert 13.8 in doubles; insert returns pair in which
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// p.first represents location of 13.8 in doubles and
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// p.second represents whether 13.8 was inserted
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auto p{doubles.insert(13.8)}; // value not in set
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std::cout << fmt::format("\n{} {} inserted\n", *(p.first),
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(p.second ? "was" : "was not"));
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std::cout << "doubles contains: ";
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std::ranges::copy(doubles, output);
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// insert 9.5 in doubles
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p = doubles.insert(9.5); // value already in set
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std::cout << fmt::format("\n{} {} inserted\n", *(p.first),
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(p.second ? "was" : "was not"));
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std::cout << "doubles contains: ";
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std::ranges::copy(doubles, output);
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std::cout << "\n";
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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