learn objective-c

objective-c/hello/hello.m

@@ -0,0 +1,6 @@
+#import <stdio.h>
+
+int main(int argc, const char *argv[]){
+    printf("hello\n");
+    return 0;
+}

objective-c/interface/Fraction.h

@@ -0,0 +1,13 @@
+#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

objective-c/interface/Fraction.m

@@ -0,0 +1,24 @@
+#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

objective-c/interface/main.m

@@ -0,0 +1,21 @@
+#import <stdio.h>
+#import "Fraction.h"
+
+int main( int argc, const char *argv[] ) {
+    // create a new instance
+    Fraction *frac = [[Fraction alloc] init];
+
+    // set the values
+    [frac setNumerator: 1];
+    [frac setDenominator: 3];
+
+    // print it
+    printf( "The fraction is: " );
+    [frac print];
+    printf( "\n" );
+
+    // free memory
+    [frac release];
+
+    return 0;
+}

objective-c/interface/makefile

@@ -0,0 +1,4 @@
+run:
+	gcc -c Fraction.m -I /usr/include/GNUstep/
+	gcc main.m Fraction.o -o s -I /usr/include/GNUstep/
+	./s