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1#import <Foundation/Foundation.h>2 3@interface MyException : NSException4{5 int extra_info;6}7- (NSException *) initWithExtraInfo: (int) info;8@end9 10@implementation MyException11- (NSException *) initWithExtraInfo: (int) info12{13 [super initWithName: @"NSException" reason: @"Simple Reason" userInfo: nil];14 self->extra_info = info;15 return self;16}17@end18 19int20main(int argc, char **argv)21{22 // Set a breakpoint here for plain exception:23 @try {24 NSException *plain_exc = [[NSException alloc] initWithName: @"NSException" reason: @"Simple Reason" userInfo: nil];25 [plain_exc raise];26 }27 @catch (id anException) {}28 29 // Set a breakpoint here for MyException:30 @try {31 MyException *my_exc = [[MyException alloc] initWithExtraInfo: 100];32 [my_exc raise];33 }34 @catch (id anException) {}35 36 return 0;37}38