1)工程文件 QT=core CONFIG+=c17cmdline YoucanmakeyourcodefailtocompileifitusesdeprecatedAPIs. Inordertodoso,uncommentthefollowingline. DEFINES+=QT_DISABLE_DEPRECATED_BEFORE=0x060000disablesalltheAPIsdeprecatedbeforeQt6.0.0 DEFINES+=_DEBUG DEFINES+=TEST_MEASUREMENTS SOURCES+=\ cprecisetimer.cpp\ main....