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));...
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
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
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
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 signed short int int16_t; typedef signed int int32_t;//在32位环境里,int代表4个字节32位!! typedef signed __int64 int64_t; typedef unsigned char uint8_t; typedef unsigned short int uint16_t; typedef unsigned int uint32_t; ...
学C语言得当时候老师应该有说过，int在不同的编译器所占的字节是不同的，比如TC int就是2字节，VC就是4字节。STM32是32位机，int占4字节。typedef signed __int64 int64_t; 从字面上就能理解意思，long int。 __int64是宏或者typedef定义过的符号 ...
int64_t : typedef signed long uint64_t : typedef unsigned long 2.嵌入式编程中的无符号类型 unsigned char = uint8_t = u8 unsigned short = uint16_t = u16 unsigned int = uint32_t = u32 因为嵌入式编程中常用十六进制数作为数据类型(0x),所以上述常用的无符号数据类型可以不需要准确计算取值范围...
4.typedefsignedintint32_t;5.typedefsigned__int64int64_t;6.7. /* exact-width unsigned intege...
typedef signed __int64 int64_t; typedef unsigned char uint8_t; typedef unsigned short int uint16_t; typedef unsigned int uint32_t; typedef unsigned __int64 uint64_t; stm32f10x.h 这个文件主要是为了兼容旧版本吧 typedef uint32_t u32;///32位 ...