Objective C - Problem

problem (einfach mal lesen):

------------------------complex.h

#import <objc/Object.h>

@interface Complex : Object
{
double real;
double imaginary;
}

-(void) setReal: (double) a;
-(void) setImaginary: (double) b;
-(void) setReal: (double) a andImaginary: (double) b;

-(double) getReal;
-(double) getImaginary;
-(Complex *) add: (Complex *) f;

-(void) print;
@end

------------------------------complex.m

#import "Complex.h"

@implementation Complex

-(void) setReal: (double) a
{
real = a;
}

-(void) setImaginary: (double) b
{
imaginary = b;
}

-(void) setReal: (double) a andImaginary: (double) b
{
real = a;
imaginary = b;
}

-(double) getReal
{
return real;
}

-(double) getImaginary
{
return imaginary;
}
-(Complex *) add: (Complex *) InComp
{
Complex *OutComp = [[Complex alloc] init];

[OutComp setReal: real + [InComp getReal] andImaginary: imaginary + [InComp getImaginary] ];

return OutComp;
}

-(void) print
{
printf ("(%d + %di) ", real , imaginary ); // egal ob %di oder %d i (%d = single char)
}

@end

--------------------------- main.m

#import "Complex.h"

int main(int argc, char *argv[])
{
Complex *Comp = [[Complex alloc] init];

[Comp setReal: 0.1];
[Comp setImaginary: 2.0];
[Comp print];

[Comp free];
}

-------------------------- Ergebnis in der console:
(-1717986918 + 1069128089i)
ähm ja ....
bei
[Comp setReal: 0.0];
[Comp setImaginary: 0.0];
kommt
(0 + 0i)
(auch bei statt double -> float)
HILFE!!!!

problem gefunden

Quote

-(void) print
{
printf ("(%d + %di) ", real , imaginary ); // egal ob %di oder %d i (%d = single char)
}

müsste eigentlich
-(void) print
{
printf ("(%g + %gi) ", real , imaginary ); // egal ob %di oder %d i (%d = single char)
}
oder
-(void) print
{
printf ("(%f + %fi) ", real , imaginary ); // egal ob %di oder %d i (%d = single char)
}
sein , war einfach der falsche pointer .
aber %d ist doch pointer auf eine Variable vom typ double oder nicht?