谢谢你的回复!
我加上去之后有提示lib有问题,我也加了lib文件夹下的CyAPI.lib,好像没起作用,能帮忙再看看吗
LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of other libs; use /NODEFAULTLIB:library
CyAPI.lib(CyAPI.obj) : error LNK2019: unresolved external symbol __imp_SetupDiDestroyDeviceInfoList referenced in function "public: unsigned char __cdecl CCyUSBDevice::DeviceCount(void)" (?DeviceCount@CCyUSBDevice@@QEAAEXZ)