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__except
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Category
Statements, Keyword Extensions
Syntax
__except (expression) compound-statement
Description
The __except keyword specifies the action that should be taken when the exception specified by expression has been raised.
Example
The following is the code fragment shows how to use the __except construct:
#include <stdio.h>
#include <string.h>
#include <windows.h>
class Exception
{
public:
Exception(char* s = "Unknown"){what = strdup(s); }
Exception(const Exception& e ){what = strdup(e.what); }
~Exception() {free(what); }
char* msg() const {return what; }
private:
char* what;
};
int main()
{
float e, f, g;
try
{
try
{
f = 1.0;
g = 0.0;
try
{
puts("Another exception:");
e = f / g;
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
puts("Caught a C-based exception.");
throw(Exception("Hardware error: Divide by 0"));
}
}
catch(const Exception& e)
{
printf("Caught C++ Exception: %s :\n", e.msg());
}
}
__finally
{
puts("C++ allows __finally too!");
}
return e;
}
Running the above program results in the following:
Another exception:
Caught a C-based exception.
Caught C++ exception[Hardware error: Divide by 0]
C++ allows __finally too!