Objective C code

Hello,

i just wrote a code to perform mathematical operations. the interface, implementation and main sections are written in the same file. after building and running, the code shows the following error.

Fraction.h no such file or directory
cannot find interface declaration for fraction

I tried to remove these errors by writing interface file again but its of no use. plz go through the code and let me know my mistake

Here's the code...

Since you put the interface, implementation and the Main function all in one file, why are you trying to "import" a header file?

You should move the interface definition into the Fraction.h file, and leave the implementation and Main section in the current file.

Regards

Hi RazOrEdge,

Thanks for your reply. I tried moving the interface and implementation section to other files but I am still getting the same errors

Here are the files:

FILE 1:

INTERFACE SECTION



#import <Foundation/Foundation.h>

@interface Fraction (MathOps)

-(Fraction *) add: (Fraction *) f;
-(Fraction *) mul: (Fraction *) f;
-(Fraction *) sub: (Fraction *) f;
-(Fraction *) div: (Fraction *) f;
@end






FILE 2:

IMPLEMENTATION SECTION


#import "Fraction.h"

@implementation Fraction (MathOps)
-(Fraction *) add: (Fraction *) f
{

// To add two fractions;
// a/b + c/d = ((a*d) + (b*c)) / (b*d)

Fraction *result = [[Fraction alloc] init];
int resultNum, resultDenom;

resultNum = (numerator * f.denominator) + (denominator * f.numerator);
resultDenom = denominator * f.denominator;

[result setTo: resultNum over: resultDenom];
[result reduce];

return result;
}


-(Fraction *) sub: (Fraction *) f
{

// To sub two fractions:
// a/b - c/d = ((a*d) - (b*c)) / (b*d)

Fraction *result = [[Fraction alloc] init];
int resultNum, resultDenom;

resultNum = (numerator * f.denominator) - (denominator * f.numerator);
resultDenom = denominator * f.denominator;

[result setTo: resultNum over: resultDenom];
[result reduce];

return result;
}

-(Fraction *) mul: (Fraction *) f
{
Fraction *result = [[Fraction alloc] init];

[result setTo: numerator * f.numerator over: denominator * f.denominator];
[result reduce];

return result;
}

-(Fraction *) div: (Fraction *) f
{
Fraction *result = [[Fraction alloc] init];

[result setTo: numerator * f.denominator over: denominator * f.numerator];
[result reduce];

return result;
}
@end






FILE 3:


MAIN SECTION


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

Fraction *a = [[Fraction alloc] init];
Fraction *b = [[Fraction alloc] init];
Fraction *result;

[a setTo: 1 over: 3];
[b setTo: 2 over: 5];

[a print];
NSLog (@" +");
[b print];
NSLog (@"-----");
result = [a add: b];
[result print];
NSLog (@"\n");
[result release];

[a print];
NSLog (@" -");
[b print];
NSLog (@"-----");
result = [a sub: b];
[result print];
NSLog (@"\n");
[result release];

[a print];
NSLog (@" *");
[b print];
NSLog (@"-----");
result = [a mul: b];
[result print];
NSLog (@"\n");
[result release];

[a print];
NSLog (@" /");
[b print];
NSLog (@"-----");
result = [a div: b];
[result print];
NSLog (@"\n");
[result release];

[a release];
[b release];

[pool drain];
return 0;
}