When using ddd (Data Display Debugger) to debug C code, it can be used to look directly inside the contents of an array, by right-clicking on the array name and selecting "display".
In my case this has proved invaluable for looking at a binary tree data structure whose nodes contain arrays.
I've just moved the program to C++, and started to use vectors instead of arrays.
Now I can't use ddd to look at the entire contents of a vector.
It displays the name of the vector and the phrase <no data fields>
If anybody knows how to get ddd to display vectors, I'd be much obliged for their advice.