54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
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// fig12_04.cpp
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// Demonstrating stack unwinding.
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#include <iostream>
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#include <stdexcept>
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// function3 throws runtime error
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void function3() {
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std::cout << "In function 3\n";
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// no try block, stack unwinding occurs, return control to function2
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throw std::runtime_error{"runtime_error in function3"};
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}
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// function2 invokes function3
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void function2() {
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std::cout << "function3 is called inside function2\n";
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function3(); // stack unwinding occurs, return control to function1
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}
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// function1 invokes function2
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void function1() {
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std::cout << "function2 is called inside function1\n";
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function2(); // stack unwinding occurs, return control to main
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}
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// demonstrate stack unwinding
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int main() {
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// invoke function1
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try {
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std::cout << "function1 is called inside main\n";
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function1(); // call function1 which leads to a runtime_error
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}
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catch (const std::runtime_error& error) { // handle runtime error
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std::cout << "Exception occurred: " << error.what()
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<< "\nException handled in main\n";
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}
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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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