第二讲:什么叫做“类”
Fraction.h#import <Foundation/NSObject.h>
@interface Fraction: NSObject
{
int numerator;
int denominator;
}
-(void) print;
-(void) setNumerator: (int) n;
-(void) setDenominator: (int) d;
-(int) numerator;
-(int) denominator;
@end
Fraction.m
#import "Fraction.h"
#import <stdio.h>
@implementation Fraction
-(void) print
{
printf("%i/%i",numerator,denominator);
}
-(void) setNumerator: (int) n
{
numerator = n;
}
-(void) setDenominator: (int) d
{
denominator = d;
}
-(int) denominator
{
return denominator;
}
-(int) numerator
{
return numerator;
}
@end
main.m
#import <stdio.h>
#import "Fraction.h"
int main( int argc, const char *argv[] )
{
Fraction *frac = [ init];
;
;
printf( "The fraction is: " );
;
;
return 0;
}
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