45 lines
1.9 KiB
C++
45 lines
1.9 KiB
C++
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// fig20_01.cpp
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// Demonstrating const_cast.
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#include <cctype> // contains prototype for function toupper
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#include <iostream>
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#include <string>
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// returns the larger of two strings
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const std::string& maximum(
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const std::string& first, const std::string& second) {
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return (first > second ? first : second);
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}
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int main() {
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std::string s1{"hello"}; // non-const string
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std::string s2{"goodbye"}; // non-const string
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// const_cast required to allow the const reference returned by
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// maximum to be assigned to the std::string reference max
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std::string& max{const_cast<std::string&>(maximum(s1, s2))};
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std::cout << "The larger string is: " << max << "\n";
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for (char& character : max) {
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character = std::toupper(character);
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}
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std::cout << "The larger string capitalized is: " << max << "\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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