※2013/09/30 NSIntgerの情報が抜けていたので追記。 この様なプログラムで確認。 NSLog(@"sizeof(char)=%zu", sizeof(char)); NSLog(@"sizeof(BOOL)=%zu", sizeof(BOOL)); NSLog(@"sizeof(bool)=%zu", sizeof(bool)); NSLog(@"sizeof(short)=%zu", sizeof(short)); NSLog(@"sizeof(int)=%zu", sizeof(int)); NSLog(@"sizeof(long)=%zu", sizeof(long)); NSLog(@"sizeof(long long)=%zu", sizeof(long long)); int a = 10; NSLog(@"sizeof(&a)=%zu", sizeof(&a)