iOS Calculator - Just Add

Calculator.h
---------------

#import <Foundation/Foundation.h>

@interface Calculator : NSObject

-(int) add:(int)a and:(int)b;
@property (retain) NSString *name;

@end


Calculator.m
----------------

#import "Calculator.h"

@implementation Calculator

-(int) add:(int)a and:(int)b
{
    return a + b;
}

@synthesize name;

@end

main.m
---------
#import
#import "Calculator.h"

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

    @autoreleasepool {
       
        // insert code here...
        NSLog(@"Hello, World!");
       
        Calculator *calculator = [[Calculator alloc] init];
       
        int sum = [calculator add:10 and:20];
       
        NSLog(@"%d", sum);
       
        calculator.name = @"Simple Calculator";
       
        NSLog(@"%@", calculator.name);
       
        [calculator release];
    }
   
    return 0;
}