(Cathing All Exceptions) Write a program that demonstrates several exception types being caught with the catch(...) exception handler.

Question

What will be an ideal response?

Answer 1

```
#include
#include
using namespace std;

// class TestException1 definition
class TestException1 : public runtime_error
{
public:
// constructor specifies error message
TestException1::TestException1()
: runtime_error( "TestException1" ) {}
}; // end class TestException1
```
```
#include
#include
using namespace std;

// class TestException2 definition
class TestException2 : public runtime_error
{
public:
// constructor specifies error message
TestException2::TestException2()
: runtime_error( "TestException2" ) {}
}; // end class TestException2
```
```
#include
#include // prototype for time
#include // prototypes for srand and rand
#include "TestException1.h"
#include "TestException2.h"
using namespace std;

void generateException();

int main()
{
srand( time( 0 ) ); // using current time to randomize random number

// loop 5 times to generate various exceptions
for ( int i = 0; i < 5; i++ )
{
try // generate exception
{
generateException();
} // end try
catch( ... )
{
cerr << "The \"catch all\" exception handler was invoked\n";
} // end catch
} // end for

return 0;
} // end main

// throw exception randomly
void generateException()
{
int type = 1 + rand() % 3;
TestException1 exception1;
TestException2 exception2;

switch( type )
{
case 1: // throw int exception
cout << "\nThrowing exception of type int...\n";
throw( 10 );
case 2: // throw TestException1
cout << "\nThrowing exception of type TestException1...\n";
throw( exception1 );
case 3: // throw TestException2
cout << "\nThrowing exception of type TestException2...\n";
throw( exception2 );
} // end switch
} // end function generateException
```
Throwing exception of type TestException2...
The "catch all" exception handler was invoked
Throwing exception of type TestException1...
The "catch all" exception handler was invoked
Throwing exception of type TestException2...
The "catch all" exception handler was invoked
Throwing exception of type TestException1...
The "catch all" exception handler was invoked
Throwing exception of type int...
The "catch all" exception handler was invoked