首页uint32 unCompressLength = 0; memcpy(&unCompressLength, md5p + LIVE_DATA_HEADER_LEN_OFFSET, BUFLEN__); char src[unCompressLength] = {0}; 报错error: variable-sized object may not be initialized char src[unCompressLength] = {0};，给出修改后代码

uint32 unCompressLength = 0; memcpy(&unCompressLength, md5p + LIVE_DATA_HEADER_LEN_OFFSET, BUFLEN__); char src[unCompressLength] = {0}; 报错error: variable-sized object may not be initialized char src[unCompressLength] = {0};，给出修改后代码

时间: 2024-02-25 11:58:33 浏览: 64

MLX90615-master_float_HAL_I2C_Mem_Read_MLX90615_

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bool Mlx90615_ReadTempTarget(float *Temp){ uint8_t Data[3]; if(HAL_I2C_Mem_Read(&_MLX90615_I2C_MLX90615_I2C_ADDRESS0x27I2C_MEMADD_SIZE_8BITData3100)!=HAL_OK) return false; double tempFactor = 0.02; double tempData = 0x0000; tempData = (double)(((Data[1] & 0x007F) << 8) | Data[0]); tempData = (tempData * tempFactor); *Temp = (float)(tempData - 273.15); return true;}

由于数组的长度需要在编译时确定，所以不能使用变量`unCompressLength`来定义数组。可以使用动态分配内存的方式来实现： ``` uint32 unCompressLength = 0; memcpy(&unCompressLength, md5p + LIVE_DATA_HEADER_LEN_OFFSET, BUFLEN__); char* src = new char[unCompressLength](); ``` 注意在使用完`src`后需要手动释放内存： ``` delete[] src; ```

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