CODEWITHSUNDEEP
cdatabasesqlitesave
inckka
inckka

Reputation: 345

What is a common way of saving and retrieving simple data between a C program closing and restarting?

There's a simple C application made using GTK+2. It also has simple data on the interface, and the application needs to save the last used values before closing so that they can be loaded when the application starts again.

I found a few methods to save load data.

  1. Saving a text file and load it.
  2. Using a DB.

Since I'm a beginner with C, either way I need to do a RnD and start implementing. I need to know the best/standard/effective method which is used by C programming professionals for this kind of scenario.

Edit: Nature of data

Data which need to be saved and retrieved are as follows.

Above data is used by the application to draw a diagram on the interface. When the application starts, it should draw the diagram using the old values.

Upvotes: 0

Views: 1031

Answers (1)

jyvet
jyvet

Reputation: 2201

The straightforward way

The easiest way would be to put the variables you want to store in a struct. Then you can output/load the content of the struct in/from a file (in binary mode). The pro of this technique is that you do not have to go through all your variables. I would definitely go for this solution if you can close your program properly.

Checkpoint/Restart libraries

In High Performance Computing, when launching a simulation code which takes a long time to execute (or/and using a large amount of compute nodes), it is quite common to use checkpoint/restart libraries. If there is a failure, the program may be restarted from the previous valid checkpoint. It is used more often when something may go wrong during the execution.

Upvotes: 1

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