variable type in c code generation

In a recursive function, the return value can be of types such as numbers, strings, or arrays. In MATLAB, this return value can be represented by one variable. However, this function cannot generate C code,because in C code, it is not possible to change the type of a variable through assignment.

In C code, it seems that a structure containing a union type could be used to address this issue, but I am unsure how to generate such a variable in code generation.

[孜然牛肉]

or is there any method to decode json file in matlab and can be converted to C code?

[Abhishek]

Hi @孜然牛肉, which version of MATLAB are you using? You may try decoding the JSON file using the 'jsondecode'. It will return you a string data. That string can be stored as an array of characters.