C:\Users\mnbss\Desktop>g++ a.cpp -o ab.exe -leasyx
K:/gcc/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: K:/gcc/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/lib/../lib/libeasyx.a(EasyX.GraphWnd.o):EasyX.GraphWnd.cpp:(.text+0x183c): undefined reference to `__imp___iob_func'
collect2.exe: error: ld returned 1 exit status
为什么啊？