新人求助

'111.exe': Loaded 'D:\C++ Training Book\111\Debug\111.exe', Symbols loaded.
'111.exe': Loaded 'C:\Windows\SysWOW64\ntdll.dll', Cannot find or open the PDB file
'111.exe': Loaded 'C:\Windows\SysWOW64\kernel32.dll', Cannot find or open the PDB file
'111.exe': Loaded 'C:\Windows\SysWOW64\KernelBase.dll', Cannot find or open the PDB file
'111.exe': Loaded 'C:\Windows\SysWOW64\msvcp100d.dll', Symbols loaded.
'111.exe': Loaded 'C:\Windows\SysWOW64\msvcr100d.dll', Symbols loaded.
The program '[4516] 111.exe: Native' has exited with code 0 (0x0).
请问为什么有时候我设定Output可在运行了之后连Output都没显示就直接退出了？