loading a graph from txt file

I have finished implementing my graph and the adjacency matrix. Now I have to save it to an txt file and also load it. I am thinking of saving it in form of adjacency matrix. But then, how I will load it? I think I am able to only load it and display it. Is there any way to edit it after I load it?
closed account (S6k9GNh0)
So, what? Have you looked at file streams?
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