53 lines
2.3 KiB
C++
53 lines
2.3 KiB
C++
|
// fig02_06.cpp
|
||
|
|
// Standard library string class test program.
|
||
|
|
#include <iostream>
|
||
|
|
#include <string>
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int main() {
|
||
|
|
string s1{"happy"};
|
||
|
|
string s2{" birthday"};
|
||
|
|
string s3; // creates an empty string
|
||
|
|
|
||
|
|
// display the strings and show their lengths (length is C++20)
|
||
|
|
cout << "s1: \"" << s1 << "\"; length: " << s1.length()
|
||
|
|
<< "\ns2: \"" << s2 << "\"; length: " << s2.length()
|
||
|
|
<< "\ns3: \"" << s3 << "\"; length: " << s3.length();
|
||
|
|
|
||
|
|
// compare strings with == and !=
|
||
|
|
cout << "\n\nThe results of comparing s2 and s1:" << boolalpha
|
||
|
|
<< "\ns2 == s1: " << (s2 == s1)
|
||
|
|
<< "\ns2 != s1: " << (s2 != s1);
|
||
|
|
|
||
|
|
// test string member function empty
|
||
|
|
cout << "\n\nTesting s3.empty():\n";
|
||
|
|
|
||
|
|
if (s3.empty()) {
|
||
|
|
cout << "s3 is empty; assigning to s3;\n";
|
||
|
|
s3 = s1 + s2; // assign s3 the result of concatenating s1 and s2
|
||
|
|
cout << "s3: \"" << s3 << "\"";
|
||
|
|
}
|
||
|
|
|
||
|
|
// testing new C++20 string member functions
|
||
|
|
cout << "\n\ns1 starts with \"ha\": " << s1.starts_with("ha") << "\n";
|
||
|
|
cout << "s2 starts with \"ha\": " << s2.starts_with("ha") << "\n";
|
||
|
|
cout << "s1 ends with \"ay\": " << s1.ends_with("ay") << "\n";
|
||
|
|
cout << "s2 ends with \"ay\": " << s2.ends_with("ay") << "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
|
||
|
|
* Pearson Education, Inc. All Rights Reserved. *
|
||
|
|
* *
|
||
|
|
* DISCLAIMER: The authors and publisher of this book have used their *
|
||
|
|
* best efforts in preparing the book. These efforts include the *
|
||
|
|
* development, research, and testing of the theories and programs *
|
||
|
|
* to determine their effectiveness. The authors and publisher make *
|
||
|
|
* no warranty of any kind, expressed or implied, with regard to these *
|
||
|
|
* programs or to the documentation contained in these books. The authors *
|
||
|
|
* and publisher shall not be liable in any event for incidental or *
|
||
|
|
* consequential damages in connection with, or arising out of, the *
|
||
|
|
* furnishing, performance, or use of these programs. *
|
||
|
|
**************************************************************************/
|