How to Debug in Codeblocks

How to do line by line debugging in Code::Blocks IDE?

You can use the "Step Into" command in the "Debug" menu which should start debugging and stop at the first line. Then continue through using the "Next Line" command (also in the "Debug" menu).

If that doesn't work as intended, you can set a breakpoint (by clicking in the left 'gutter', or 'margin') at the first line of your app, and start the debugger from the "Debug" menu, and then use the "Next Line" command in the "Debug" menu.

The shortcut keys vary based on your settings but should be listed alongside the menu command, and makes 'step'ping easier.

Since you're using gcc to compile, you can specify the -g parameter to include debugging symbols, and invoke gdb from the a command shell with the compiled binary as an argument: gdb <yourapp>.
(If [n]curses is installed, specify -tui for a more pleasing interface: gdb -tui <yourapp>.

Once in gdb, the command start will start debugging and stop automatically at main(). You can then step thru with the step command, and quit to exit.

You can always man gdb...

How to debug standalone file in Code::Blocks?

I guess you were trying to debug a standalone file (file not belonging to a project). Code::Blocks doesn't support debugging such files. Try including the file to be compiled as a part of an empty project or something.

How do you debug using 'Code::Blocks 20.03' (the mingw version)?

To get debugging working, the type of fix described here wil be required if you install the MinGW version of Code::Blocks 20.03 on Windows, using codeblocks-20.03mingw-setup.exe ( the 8th April 2021 version, with the default installation accepted ).

What I did to get it to work was the following.

From the Settings menu I clicked on Debugger.., then on the left of the screen selected Default, a debugger type. This showed me Executable paths which was set to

C:\MinGW\bin\gdb.exe

I changed this to

C:\Program Files\Codeblocks\MinGW\bin\gdb.exe

I was then able to use the debugger.

How to debug in Codeblocks?

First set a breakpoint at the beginning of your code or codeblocks won't go line by line.

When you run your program with debug mode (check the menus) you should get some toolbars with controls to advance lines and view variables. You can you the value of a variable by hovering over it in your code.

How do you specify a debugger program in Code::Blocks 12.11?

In the Code::Blocks IDE, navigate Settings -> Debugger
In the tree control at the right, select Common -> GDB/CDB debugger -> Common.
Then in the dialog at the left you can enter Executable path and choose
Debugger type = GDB or CDB, as well as configuring various other options.

Using Codeblocks for step by step execution of my code

Code::blocks provide the debugging feature. We can watch the values of variables and execute step by step.

Create the project
Add the break point by right click the mouse at the line number where you want and choose Toggle Break point.
Click on Debug menu and form debugging windows option select watches window.

In watches window you can see the values of variable and for step by step execution after break point use shift+F7 key.

My answer may not be clear for you or for further information you can follow this codeblocks wiki page http://wiki.codeblocks.org/index.php?title=Debugging_with_Code::Blocks

Code::Blocks Debugger : how to `step into` functions on line-by-line execution?

Set a breakpoint (red circle) exactly on the line the function main is defined;
Instead of pressing F8 (the same as clicking Debug->Start/Continue), which would make the program just run until the last line and exit (only flashing on the screen before disappearing), press Shift+F7 (the same as clicking Debug->Step Into), in order to make the debugger enter the function and not just run it completely and return its result;
Press F7 (the same as clicking Debug->Next line) to keep watching the program run "step-by-step";
When any other function is called, and the debugger is on that line (yellow arrow), you may enter that other function too, by repeating step 2.

Reference: ImageCraft - CodeBlocks Debugger Functions.

Source Line Stepping
Once paused, you can continue execution:
Debug->Start/Continue runs the program until the next breakpoint.
Debug->next line runs the program until the next source line. If the current source line contains a function call, it will “step over” the function call.
Debug->Step into will “step into” a function call, and pause at the next source line.
Debug->Step out will continue program execution until the function call returns to its caller.
Debug->Next instruction and Debug->Step into instruction are assembly debugging commands, and should not be used within the CodeBlocks IDE. Instead, the corresponding commands in the ADT should be used.