/*填空題*/
#import?<Foundation/Foundation.h>
/*去掉NSLog的時間戳*/
#ifdef?DEBUG
#define?NSLog(FORMAT,?...)?fprintf(stderr,"%s",[[NSString?stringWithFormat:FORMAT,?##__VA_ARGS__]?UTF8String]);
#else
#define?NSLog(...)
#endif
/**
?*?答案可參考我的“手記”
?*/
int?main(int?argc,?const?char?*?argv[])?{
????????if(?????????????){?//請在if圓括號內填寫代碼，使得最終輸出結果為“AB”
????????????NSLog(@"A");
????????}else{
????????????NSLog(@"B");
????????}
????return?0;
}