(Stack Unwinding) Write a program that throws an exception from a deeply nested func- tion and still has the catch handler following the try block enclosing the call chain catch the excep- tion.

Question

What will be an ideal response?

Answer 1

```
2 #include
3 #include
4 using namespace std;
5
6 // class TestException definition
7 class TestException : public runtime_error
8 {
9 public:
10 // constructor specifies error message
11 TestException::TestException( const string& message )
12 : runtime_error( message ) {}
13 }; // end class TestException
```
```
#include
#include "TestException.h"
using namespace std;

void f()
{
throw TestException( "TestException" );
} // end function f

void g() { f(); } // end function g

void h() { g(); } // end function h

int main()
{
try
{
h();
} // end try
catch ( TestException &t ) // catch any exceptions that occurred in h
{
cerr << "In main: Caught " << t.what() << ’\n’;
} // end catch

return 0;
} // end main
```