How to debug using gdb?

Question

I am trying to add a breakpoint in my program using

b {line number}

but I am always getting an error that says:

No symbol t         


        

Answer 1

Start gdb with the executable as a parameter, so that it knows which program you want to debug:

gdb ./myprogram

Then you should be able to set breakpoints. For example:

b myfile.cpp:25
b some_function