Loaded 'APP01.EXE', no matching symbolic information found.
Loaded 'C:\Windows\SysWOW64\kernel32.dll', no matching symbolic information found.
Loaded 'C:\Windows\SysWOW64\KernelBase.dll', no matching symbolic information found.
The thread 0x744 has exited with code 21 (0x15).
The program 'F:\C程序练习\Debug\nn.exe' has exited with code 21 (0x15).

C语言单步调试出现上面错误，一闪就消失
Windows10系统 VCC+6.0
谢谢大家