Debugging with Code::Blocks

Make sure that the project is compiled with the -g compiler option.

Menu => Project => Build Options

Open The Debugger Watches Window

Find the line containing the variable to be watched. Set a breakpoint in a position that will allow you to observe the variable value.

Menu => Debug => Toggle Breakpoint

Run the debugger until the breakpoint is reached. Right click the variable to set a watch in the Watch Window.