详解 IOS下int long longlong的取值范围
32bit下:
? 1 2 3 4 5 6 7 8 9 10 unsigned int 0~4294967295 int -2147483648~2147483647 unsigned long 和int一样 long 和int一样 long long的最大值:9223372036854775807 long long的最小值:-9223372036854775808 unsigned long long的最大值:1844674407370955161 __int64的最大值:9223372036854775807 __int64的最小值:-9223372036854775808 unsigned __int64的最大值:1844674407370955161564bit下
? 1 2 3 4 5 6 7 8 9 10 unsigned int 0~4294967295 int -2147483648~2147483647 unsigned long 和 unsigned long long一样 long 和long long一样 long long的最大值:9223372036854775807 long long的最小值:-9223372036854775808 unsigned long long的最大值:1844674407370955161 __int64的最大值:9223372036854775807 __int64的最小值:-9223372036854775808 unsigned __int64的最大值:18446744073709551615NSObjCRuntime.h文件中:
? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 #ifndef _OBJC_NSOBJCRUNTIME_H_ #define _OBJC_NSOBJCRUNTIME_H_ #include <TargetConditionals.h> #include <objc/objc.h> #if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64 typedef long NSInteger; typedef unsigned long NSUInteger;//64bit下NSInteger的取值范围就是long==long long #else typedef int NSInteger; typedef unsigned int NSUInteger;//32bit下NSInteger的取值范围就是int==long #endif #define NSIntegerMax LONG_MAX #define NSIntegerMin LONG_MIN #define NSUIntegerMax ULONG_MAX #define NSINTEGER_DEFINED 1 #endif感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
原文链接:http://blog.csdn.net/jingqiu880905/article/details/50477421