Is there any tool available in linux which can generate flowchart from C code?

I need to create flowcharts for C code which i wrote for my project. I was searching for free software in linux which can do the task for me. and i came across Dia ,but it is not automatic flowchart generator. also i tried online tool like code2flow,but it will generate ".png" or pdf format of flowchart,which i dont wan't.I want to generate flowchart which i should be able to export to word document,and if some one want to change/edit some part flowchart he should be able to edit it(so iam avoiding img files). Please suggest me proper tool.