48 lines
2.1 KiB
C++
48 lines
2.1 KiB
C++
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// fig08_01.cpp
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// Demonstrating string assignment and concatenation.
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#include <fmt/format.h>
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#include <iostream>
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#include <string>
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int main() {
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std::string s1{"cat"};
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std::string s2; // initialized to the empty string
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std::string s3; // initialized to the empty string
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s2 = s1; // assign s1 to s2
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s3.assign(s1); // assign s1 to s3
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std::cout << fmt::format("s1: {}\ns2: {}\ns3: {}\n\n", s1, s2, s3);
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s2.at(0) = 'r'; // modify s2
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s3.at(2) = 'r'; // modify s3
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std::cout << fmt::format("After changes:\ns2: {}\ns3: {}", s2, s3);
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std::cout << "\n\nAfter concatenations:\n";
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std::string s4{s1 + "apult"}; // concatenation
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s1.append("acomb"); // create "catacomb"
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s3 += "pet"; // create "carpet" with overloaded +=
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std::cout << fmt::format("s1: {}\ns3: {}\ns4: {}\n", s1, s3, s4);
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// append locations 4 through end of s1 to
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// create string "comb" (s5 was initially empty)
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std::string s5; // initialized to the empty string
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s5.append(s1, 4, s1.size() - 4);
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std::cout << fmt::format("s5: {}", s5);
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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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