Main Method
**************************************************
#import <Foundation/Foundation.h>
#import "XYZShoutingPerson.h"

int main(int argc, const char * argv[])
{

    @autoreleasepool {

        XYZPerson *person=[[XYZPerson alloc] init];
        if(person)
        {
        [person sayHello];
        }
        else
        {
            NSLog(@"Person Object is NULL");
        }
            }
    return 0;
}
****************************************************
-(id)init
{
    self=[super init];
    return [self initWithFirstName:@"Ankit" LastName:@"Sehra" DOB:01/01/2000];
}
***************************************************

-(id)initWithFirstName:(NSString *)aFirstName LastName:(NSString *)aLastName DOB:(NSDate *)aDateOfBirth
{
    _firstName=aFirstName;
    _lastName=aLastName;
    _dateOfBirth=aDateOfBirth;
}
***********************************************
-(void)sayHello;
{
    NSLog(@"%@ %@ %@",self.firstName,self.lastName,self.dateOfBirth);
}