常用类型的取值范围

以vs2012(编译器)里的定义，对一些常用类型的取值范围做个小结。

int类型

#define INT_MIN     (-2147483647 - 1) /* minimum (signed) int value */
#define INT_MAX       2147483647    /* maximum (signed) int value */
#define UINT_MAX      0xffffffff    /* maximum unsigned int value */

long类型

#define LONG_MIN    (-2147483647L - 1) /* minimum (signed) long value */
#define LONG_MAX      2147483647L      /* maximum (signed) long value */
#define ULONG_MAX     0xffffffffUL     /* maximum unsigned long value */

long long类型

#define LLONG_MAX     9223372036854775807i64       /* maximum signed long long int value */
#define LLONG_MIN   (-9223372036854775807i64 - 1)  /* minimum signed long long int value */
#define ULLONG_MAX    0xffffffffffffffffui64       /* maximum unsigned long long int value */

_int32类型

#define _I32_MIN    (-2147483647i32 - 1) /* minimum signed 32 bit value */
#define _I32_MAX      2147483647i32      /* maximum signed 32 bit value */
#define _UI32_MAX     0xffffffffui32     /* maximum unsigned 32 bit value */

_int64类型

#define _I64_MIN    (-9223372036854775807i64 - 1) /* minimum signed 64 bit value */
#define _I64_MAX      9223372036854775807i64      /* maximum signed 64 bit value */
#define _UI64_MAX     0xffffffffffffffffui64      /* maximum unsigned 64 bit value */

double类型

#define DBL_MAX         1.7976931348623158e+308    /* max value */
#define DBL_MIN         2.2250738585072014e-308    /* min positive value */

float类型

#define FLT_MAX         3.402823466e+38F        /* max value */
#define FLT_MIN         1.175494351e-38F        /* min positive value */

不要迷信书、考题、老师、回帖；

要迷信CPU、编译器、调试器、运行结果。

并请结合“盲人摸太阳”和“驾船出海时一定只带一个指南针。”加以理解。

任何理论、权威、传说、真理、标准、解释、想象、知识……都比不上摆在眼前的事实！