No symbol table is loaded. Use the "file" command. Help me please tell me what to do.

Active debugger config: GDB/CDB debugger:Default
Building to ensure sources are up-to-date
Selecting target:
Debug
Adding source dir: D:\Informatica\aplicatii\lucruu eratostene\
Adding source dir: D:\Informatica\aplicatii\lucruu eratostene\
Adding file: D:\Informatica\aplicatii\lucruu eratostene\bin\Debug\lucruu eratostene.exe
Changing directory to: "D:/Informatica/aplicatii/lucruu eratostene/."
Set variable: PATH=.;C:\Program Files\CodeBlocks\MinGW\bin;C:\Program Files\CodeBlocks\MinGW;C:\Windows\System32;C:\Windows;C:\Windows\System32\wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\Users\ilieo\AppData\Local\Microsoft\WindowsApps
Starting debugger: C:\Program Files\CodeBlocks\MinGW\bin\gdb.exe -nx -fullname -quiet -args "D:/Informatica/aplicatii/lucruu eratostene/bin/Debug/lucruu eratostene.exe"
done
Setting breakpoints
Debugger name and version: GNU gdb (GDB) 8.1
No symbol table is loaded. Use the "file" command.
Temporary breakpoint 2 ("D:/Informatica/aplicatii/lucruu eratostene/main.cpp:7") pending.
Starting the debuggee failed: No executable specified, use `target exec'.
Debugger finished with status 0