Windows 下使用 GNUstep 编译并运行 Objective-C 程序

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cd /home

mkdir app1

cd app1

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#import <Foundation/Foundation.h>

int main (int argc, const char *argv[]) {

    //@autoreleasepool {

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSLog(@"Hello oschina");

    [pool drain];

    //}

    return 0;

}

$ gcc -o app1 app1.m -I/GNUstep/System/Library/Headers -fconstant-string-class=NSConstantString -L/GNUstep/System/Library/Libraries -lobjc -lgnustep-base

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#import "Calculate.h"

int main(int argc, char *argv[])

{

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    Calculate *cal = [[Calculate alloc] init];

    int v = 5;

    int av = 10;

    [cal setNum: v];

    [cal add: av];

    NSLog(@"%i + %i = %i\n", v, av, [cal num]);

    [pool drain];

    return 0;

}

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//Calculate.h

#import <Foundation/Foundation.h>

@interface Calculate : NSObject

{

    @private int num;

}

-(int) num;

-(void) setNum: (int) n;

-(void) add: (int) n;

@end

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#import "Calculate.h"

@implementation Calculate

-(int) num

{

    return num;

}

-(void) setNum: (int) n

{

    num = n;

}

-(void) add: (int) n

{

    num += n;

}

@end

$ gcc -o app2 Main.m Calculate.m -I/GNUstep/System/Library/Headers -fconstant-string-class=NSConstantString -L/GNUstep/System/Library/Libraries -lobjc -lgnustep-base