How to read and write json file

[ghost]

Hello! I am new and learning C++ for the first time and want to store data from my C++ application to a .json file and read the data again in C++.

My example .json file:

{
    "Name1":
    {
        "Food":"Candy",
        "Number":100
    },
    "Name2":
    {
        "Food":"Cake",
        "Number":null
    }
}

How could I read the json file and store Name1's Food (Candy) as a string in C++? Along with the Name1's Number and Name2's items.

And how could I write to the json file and save it? So that I can change Name1's Food to something like cookies?

And last but not least, how could I delete a part of the json file in C++? For example, if I want to delete the Food id or the Name2.