Objective-Cのインストール % sudo aptitude install gobjc libgnustep-base-devHello.h #ifndef HELLO_H_ #define HELLO_H_ #import <Foundation/NSObject.h> #import <Foundation/NSString.h> @interface CHello :NSObject { @private NSString *m_message; } - (id) init:(const char *) message_; - (vo</foundation/nsstring.h></foundation/nsobject.h>…