sio.err

来自「ARM 44b0x培训教程完整源代码下载」· ERR 代码 · 共 7 行

"sio.c", line 118: Warning: signed constant overflow: '<<'
"sio.c", line 179: Warning: signed constant overflow: '<<'
"sio.c", line 180: Warning: signed constant overflow: '<<'
"sio.c", line 199: Warning: variable 'error' declared but not used
"sio.c", line 199: Warning: variable 'j' declared but not used
sio.c: 5 warnings, 0 errors, 0 serious errors