static_cast<uint8_t*>将void*转换为指向uint8_t的指针,以便进行类型化访问。 (2)从其他指针类型转换为uint8_t* intx =42;int* intPtr = &x;// 将 int* 转换为 uint8_t*uint8_t* bytePtr =static_cast<uint8_t*>(reinterpret_cast<void*>(intPtr));// 通过 uint8_t* 访问内存std::cout ...
问当将值乘以static_cast<uint8_t>时，自动类型是如何确定的？EN这是Java中经典的问题,在面试中也...
#include<sstream> #include<cstdint> int main() { std::stringstream ss; char pchar = 'a'; ss << (int)pchar; //输出97 ss << (int8_t)pchar; //输出 a ss << static_cast<uint8_t>(pchar); //输出 a printf("%s\n", ss.str().c_str()); return 0; } cc++后端 有用关注2...
uint8_t *pstr /* Pointer to text string */ ) { uint8_t len; uint8_t x; uint8_t *error = "Wrong line 1 & 2"; if( line == 2 ) { LCDLine(LineTwo); } else if ( line == 1 ) { LCDLine(LineOne); } else {
static const uint8_t screenWidth = 256; static const uint8_t screenHeight = 240; uint8_t buffer[screenHeight][screenWidth ][3]; } 在Visual Studio 2019 中,我收到以下(奇怪?)错误: Error (active) E0098 an array may not have elements of this type ...
uint8_ttargetUid[]={0x33,0xc9,0xf5,0x03};// 示例UID,注意这里我修改了最后一个字节为0x00,如果这是错误的,请更正 // 只比较实际读取到的UID长度 if(uidLength==sizeof(targetUid)&&memcmp(uid,targetUid,uidLength)==0) { j++; if(j==100) ...
static rt_uint8_t mempool[4096];static struct rt_mempool mp;#define THREAD_PRIORITY 25#define THREAD_STACK_SIZE 512#define THREAD_TIMESLICE 5/* 指向线程控制块的指针 */static rt_thread_t tid1 = RT_NULL;static rt_thread_t tid2 = RT_NULL;/* 线程1入口 */static void thread1_mp_alloc...
staticBOOL wavTaskCreated = FALSE;staticQueueHandle_t wav_msg_queue =NULL;staticWAV_PLAY_QUEUE_t wavPlayQueue;staticboolwav_get_version_flag =false;staticcharwav_version[32];staticuint8_t*Wav_GetFileName(WAV_TYPE_t wav_type){ }staticboolWav_GetFileInfo(WAV_FILE_INFO_t *pFileInfo,uint8_...
int16_tSensor_I2C2_Serch(void) { for(uint8_ti=1;i<255;i++) { if(HAL_I2C_IsDeviceReady(&hi2c1,i,1,1000)==HAL_OK) { Mpu6050Addr=i>>1; returni>>1; } } return-1;// 搜索失败 } 在I²C总线上搜索可用设备,返回找到的第一个设备地址。如果没有找到任何设备,则返回-1。
没有符号的整数会被提升为有符号吗?什么是表达式类型(uint16_t)-1 * (uint16_t)-1 、、 static_assert( uint8_t(-1)*uint8_t(-1) == 1); // error: static assertion failedstatic_assert( uint64_t(-1)*uint64_t(-1) =static_assert( uint16_t(-1)*uint16_ ...