Objective C Constructors

#import<Foundation/NSObject.h>

@interface MyClass:NSObject{
int a;
int b;
}
// declare constructor
-(MyClass*) set:(int) a andb:(int) b;
-(void) sum;
@end

#import<stdio.h>
#import"MyClass.h"
@implementation MyClass

// define constructor
-(MyClass*) set:(int) x andb:(int) y {
  self = [super init];
  if(self) {
    a=x;
    b=y;
    return self;
}
}
-(void) sum {
printf("Sum is : %d",a+b);
}
@end

#import<stdio.h>
#import"MyClass.m"
int main(){

// use constructor
MyClass *class = [[MyClass alloc] set : 10 andb : 12];

[class sum];
[class release];
return ;
}