int64_t result; result= ((rectime-oritime) + (tratime-destime))/2; 当((rectime-oritime) + (tratime-destime))是负数的时候,result不能得到正确的数,需要写成如下: uint64_t destime, oritime, rectime, tratime; int64_t result, tmp; tmp= ((rectime-oritime) + (tratime-destime));...
typedef signed int int32_t; typedef signed __int64 int64_t; /* exact-width unsigned integer types */ typedef unsigned char uint8_t; typedef unsigned short int uint16_t; typedef unsigned int uint32_t; typedef unsigned __int64 uint64_t; typedef int32_t s32; typedef int16_t s16; typ...
双精度浮点数 double = 8个字节,范围为:-21024~ +21024-1 int8_t : typedef signed char; uint8_t : typedef unsigned char; int16_t : typedef signed short ; uint16_t : typedef unsigned short ; int32_t : typedef signed int; uint32_t :typedef unsigned int; int64_t : typedef signed lo...
11 typedef signed int int32_t; 12 typedef signed __INT64 int64_t; 13 14 /* exact-width unsigned integer types */ 15 typedef unsigned char uint8_t; 16 typedef unsigned short int uint16_t; 17 typedef unsigned int uint32_t; 18 typedef unsigned __INT64 uint64_t; 19 20 /* 7.18.1.2...
4.typedefsignedintint32_t;5.typedefsigned__int64int64_t;6.7. /* exact-width unsigned intege...
stm32库里面有定义 typedef signed __int64 int64_t;typedef unsigned __int64 uint64_t;所以你要定义64位变量直接用int64_t或者uint64_t定义就行，一个是有符号，一个是无符号
int = int32_t unsigned int =uint32_t long long = int64_t unsigned long iong = uint64_t 5.typedef 结构体(struct) 枚举enum typedef unsigned char uint8_t;将一个较长的变量换一个名字,但是原名字依然可以使用 struct 结构体懂的都懂struct.x=struct->x(1两种选择方式相同) ...
stm32库里面有定义\x0d\x0a\x0d\x0atypedef signed __int64 int64_t;\x0d\x0atypedef unsigned __int64 uint64_t;\x0d\x0a所以你要定义64位变量直接用int64_t或者uint64_t定义就行，一个是有符号，一个是无符号
typedefsignedcharint8_t;//标准表达方式signedchar被等同于int8_t； typedefsignedshortintint16_t; typedefsignedintint32_t;//在32位环境里，int代表4个字节32位！！ typedefsigned__int64int64_t; typedefunsignedcharuint8_t; typedefunsignedshortintuint16_t; typedefunsignedintuint32_t; typedefunsigned...
typedef signed __int64 int64_t; /* exact-width unsigned integer types */ typedef unsigned char uint8_t; typedef unsigned short int uint16_t; typedef unsigned int uint32_t; typedef unsigned __int64 uint64_t; typedef int32_t s32;