70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
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// fig14_04.cpp
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// Algorithms remove, remove_if, remove_copy and remove_copy_if.
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#include <algorithm> // algorithm definitions
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#include <iostream>
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#include <iterator> // ostream_iterator
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#include <vector>
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int main() {
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std::vector init{10, 2, 15, 4, 10, 6};
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std::ostream_iterator<int> output{std::cout, " "};
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std::vector v1{init}; // initialize with copy of init
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std::cout << "v1: ";
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std::ranges::copy(v1, output);
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// remove all 10s from v1
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auto removed{std::ranges::remove(v1, 10)};
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v1.erase(removed.begin(), removed.end());
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std::cout << "\nv1 after removing 10s: ";
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std::ranges::copy(v1, output);
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std::vector v2{init}; // initialize with copy of init
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std::cout << "\n\nv2: ";
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std::ranges::copy(v2, output);
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// copy from v2 to c1, removing 10s in the process
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std::vector<int> c1{};
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std::ranges::remove_copy(v2, std::back_inserter(c1), 10);
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std::cout << "\nc1 after copying v2 without 10s: ";
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std::ranges::copy(c1, output);
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std::vector v3{init}; // initialize with copy of init
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std::cout << "\n\nv3: ";
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std::ranges::copy(v3, output);
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// remove elements greater than 9 from v3
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auto greaterThan9{[](auto x) {return x > 9;}};
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auto removed2{std::ranges::remove_if(v3, greaterThan9)};
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v3.erase(removed2.begin(), removed2.end());
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std::cout << "\nv3 after removing elements greater than 9: ";
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std::ranges::copy(v3, output);
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std::vector v4{init}; // initialize with copy of init
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std::cout << "\n\nv4: ";
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std::ranges::copy(v4, output);
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// copy elements from v4 to c2, removing elements greater than 9
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std::vector<int> c2{};
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std::ranges::remove_copy_if(v4, std::back_inserter(c2), greaterThan9);
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std::cout << "\nc2 after copying v4 without elements greater than 9: ";
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std::ranges::copy(c2, output);
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std::cout << "\n";
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}
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/**************************************************************************
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* (C) Copyright 1992-2021 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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