iOS下int long longlong的取值范围

作者:Love@YR 

链接: http://blog.csdn.net/jingqiu880905/article/details/50477421
请尊重原创,谢谢!


32bit下:

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:18446744073709551615



64bit下

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:18446744073709551615


NSObjCRuntime.h文件中:

#ifndef _OBJC_NSOBJCRUNTIME_H_

#define _OBJC_NSOBJCRUNTIME_H_

#include

#include

#if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64

typedef long NSInteger;

typedef unsigned long NSUInteger;//64bitNSInteger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


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