57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
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/* C++ exception handling example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <iostream>
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using std::cout;
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using std::endl;
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using std::runtime_error;
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/* A simple class which may throw an exception from constructor */
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class Throwing
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{
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public:
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Throwing(int arg)
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: m_arg(arg)
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{
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cout << "In constructor, arg=" << arg << endl;
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if (arg == 0) {
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throw runtime_error("Exception in constructor");
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}
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}
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~Throwing()
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{
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cout << "In destructor, m_arg=" << m_arg << endl;
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}
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protected:
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int m_arg;
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};
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/* Inside .cpp file, app_main function must be declared with C linkage */
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extern "C" void app_main()
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{
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cout << "app_main starting" << endl;
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try {
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/* This will succeed */
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Throwing obj1(42);
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/* This will throw an exception */
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Throwing obj2(0);
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cout << "This will not be printed" << endl;
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} catch (const runtime_error &e) {
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cout << "Exception caught: " << e.what() << endl;
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}
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cout << "app_main done" << endl;
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}
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