Arithmetic/Rational/Objective-C: Difference between revisions

Content added Content deleted
m (prepare for inclusion as template)
m (modernize)
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BOOL withSign;
BOOL withSign;
}
}
+(RCRationalNumber *)valueWithNumerator:(int)num andDenominator: (int)den;
+(instancetype)valueWithNumerator:(int)num andDenominator: (int)den;
+(RCRationalNumber *)valueWithDouble: (double)fnum;
+(instancetype)valueWithDouble: (double)fnum;
+(RCRationalNumber *)valueWithInteger: (int)inum;
+(instancetype)valueWithInteger: (int)inum;
+(RCRationalNumber *)valueWithRational: (RCRationalNumber *)rnum;
+(instancetype)valueWithRational: (RCRationalNumber *)rnum;
-(instancetype)initWithNumerator: (int)num andDenominator: (int)den;
-(id)init;
-(id)initWithNumerator: (int)num andDenominator: (int)den;
-(instancetype)initWithDouble: (double)fnum precision: (int)prec;
⚫
-(instancetype)initWithInteger: (int)inum;
-(id)initWithDouble: (double)fnum precision: (int)prec;
⚫
-(instancetype)initWithRational: (RCRationalNumber *)rnum;
⚫
-(id)initWithInteger: (int)inum;
⚫
-(id)initWithRational: (RCRationalNumber *)rnum;
-(NSComparisonResult)compare: (RCRationalNumber *)rnum;
-(NSComparisonResult)compare: (RCRationalNumber *)rnum;
-(id)simplify: (BOOL)act;
-(id)simplify: (BOOL)act;
Line 63: Line 62:
@implementation RCRationalNumber
@implementation RCRationalNumber
// initializers
// initializers
-(id)init
-(instancetype)init
{
{
NSLog(@"initialized to unity");
NSLog(@"initialized to unity");
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}
}


-(id)initWithNumerator: (int)num andDenominator: (int)den
-(instancetype)initWithNumerator: (int)num andDenominator: (int)den
{
{
if ((self = [super init]) != nil) {
if ((self = [super init]) != nil) {
Line 85: Line 84:
}
}


-(id)initWithInteger:(int)inum
-(instancetype)initWithInteger:(int)inum
{
{
return [self initWithNumerator: inum andDenominator: 1];
return [self initWithNumerator: inum andDenominator: 1];
}
}


-(id)initWithDouble: (double)fnum precision: (int)prec
-(instancetype)initWithDouble: (double)fnum precision: (int)prec
{
{
if ( prec > 9 ) prec = 9;
if ( prec > 9 ) prec = 9;
Line 98: Line 97:
}
}


-(id)initWithRational: (RCRationalNumber *)rnum
-(instancetype)initWithRational: (RCRationalNumber *)rnum
{
{
return [self initWithNumerator: [rnum numerator] andDenominator: [rnum denominator]];
return [self initWithNumerator: [rnum numerator] andDenominator: [rnum denominator]];
Line 211: Line 210:
}
}


// or just test if negativ
// or just test if negative
-(BOOL)isNegative
-(BOOL)isNegative
{
{
return ([self numerator] < 0) ? YES : NO;
return [self numerator] < 0;
}
}


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// class method
// class method
+(RCRationalNumber *)valueWithNumerator:(int)num andDenominator: (int)den
+(instancetype)valueWithNumerator:(int)num andDenominator: (int)den
{
{
return [[[RCRationalNumber alloc] initWithNumerator: num andDenominator: den] autorelease];
return [[self alloc] initWithNumerator: num andDenominator: den];
}
}


+(RCRationalNumber *)valueWithDouble: (double)fnum
+(instancetype)valueWithDouble: (double)fnum
{
{
return [[[RCRationalNumber alloc] initWithDouble: fnum] autorelease];
return [[self alloc] initWithDouble: fnum];
}
}


+(RCRationalNumber *)valueWithInteger: (int)inum
+(instancetype)valueWithInteger: (int)inum
{
{
return [[[RCRationalNumber alloc] initWithInteger: inum] autorelease];
return [[self alloc] initWithInteger: inum];
}
}


+(RCRationalNumber *)valueWithRational: (RCRationalNumber *)rnum
+(instancetype)valueWithRational: (RCRationalNumber *)rnum
{
{
return [[[RCRationalNumber alloc] initWithRational: rnum] autorelease];
return [[self alloc] initWithRational: rnum];
}
}
@end</lang>
@end</lang>
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int main()
int main()
{
{
@autoreleasepool {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];


int i;
int i;
for(i=2; i < 0x80000; i++) {
for(i=2; i < 0x80000; i++) {
int candidate = i;
int candidate = i;
RCRationalNumber *sum = [RCRationalNumber valueWithNumerator: 1
RCRationalNumber *sum = [RCRationalNumber valueWithNumerator: 1
andDenominator: candidate];
andDenominator: candidate];
int factor;
int factor;
for(factor=2; factor < sqrt((double)candidate); factor++) {
for(factor=2; factor < sqrt((double)candidate); factor++) {
if ( (candidate % factor) == 0 ) {
if ( (candidate % factor) == 0 ) {
sum = [[sum add: [RCRationalNumber valueWithNumerator: 1
sum = [[sum add: [RCRationalNumber valueWithNumerator: 1
andDenominator: factor]]
andDenominator: factor]]
add: [RCRationalNumber valueWithNumerator: 1
add: [RCRationalNumber valueWithNumerator: 1
andDenominator: (candidate/factor)]];
andDenominator: (candidate/factor)]];
⚫
}
⚫
}
⚫
if ( [sum denominator] == 1 ) {
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printf("Sum of recipr. factors of %d = %d exactly %s\n",
⚫
candidate, [sum integer], ([sum integer]==1) ? "perfect!" : "");
}
}
}
}
⚫
if ( [sum denominator] == 1 ) {
⚫
printf("Sum of recipr. factors of %d = %d exactly %s\n",
⚫
candidate, [sum integer], ([sum integer]==1) ? "perfect!" : "");
⚫
}
⚫
}


}
[pool release];
return 0;
return 0;
}</lang>
}</lang>
Retrieved from "https://rosettacode.org/wiki/Arithmetic/Rational/Objective-C"