Best way to save and load data to and from file. (Beginner)

[echo reef]

I am working on a program where I need to load and save some int arrays. The basic structure I need is: int, int, int, int[256] repeated within the file as many times as I need (realisticaly about 2000x).

When reading I want to search in the file by the first three int values and if they exist I want to load the int array. If they don't exist I just want to load all 0.

When writing I want to find if the three integers exist, if they do I replace the array, if they don't I want to append a new entry.

"Human readable" format would be preferred (direct binary file would be human readable in this case as I encode data directly into the binary of the int)

I am pretty new to C++ so please be kind and don't expect I know anything 😉

[autumn knot]

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[lapis wren]

I would just write a function that writes out your data structure as 259 ints per line.
Then write a function that reads the file line by line until it finds the three ints.
Like don't worry about doing anything fancy for now

[echo reef]

Thanks. I have actually never used file access in c++. What libraries and functions should I look into to achieve this?

[lapis wren]

Probably fstreams

They can act like std::cin and std::cout

[autumn knot]

@echo reef Has your question been resolved? If so, type !solved :)

[echo reef]

Thanks.