MicroPython Forum (Archive)

How does one construct and access a set of key-value pairs in C? To use a silly simple example, let's say I want to create a table which translates between an integer and its square root.

If I were writing javascript, I could just do this:

var squareRoots = {
4: 2,
9: 3,
16: 4,
25: 5
}
and then access them like:

var squareRootOf25 = squareRoots[5]
How do I do this in C? What if I want to use one type of enum as the key and another type of enum as the value?

C doesn't have a dictionary type data structure, so you need to create one. This means you need to define your own structure and create functions for initializing, adding, removing, looking up etc, and the call those functions.

In the context of MicroPython, you could use the micropython routines for doing this.

It really depends on what you're trying to accomplish.