Objective C的学习之HelloWorld

其实是好奇优才网的那个练练手：

code:

#import <Foundation/Foundation.h>  
int main (int argc, const char *argv[]) {  
    NSAutoreleasePool *pool=[[NSAutoreleasePool alloc] init];  
    NSLog(@"Hello World!");  
    [pool drain];  
    return 0;  
}