how to convert a c source code into a pseudocode?

are there any automated tools to convert c program source code in to a pseudocode?

If not what is the easiest way to do this?

make a flow chart. follow the code write down what each segment does. ie for.... you write loop or draw a box on a chart labeled loop. ok ?

Read through them and try to understand what the "big picture" is, for each function.

Now go ahead and rough out the pseudo code for the function. Try to focus on the major points, *NOT* the details. What you want is the basic flow and logic, and none of the details.