int32_t is a fixed-width integer type defined in the C++ standard libraries (specifically in <cstdint>. It represents a signed 32-bit integer, meaning it can store whole numbers from −2,147,483,648 to 2,147,483,647.
uint32_t for unsigned 32-bit integers, which range from 0 to 4,294,967,295.
In C++, the uint8_t type is essentially an unsigned 8-bit integer, which is often treated as a char type. When you print a uint8_t variable without casting, it can be interpreted as a character because char types are used to represent characters in the ASCII table. By casting health_items to int, you ensure it is interpreted and printed as an integer rather than a character.
#endif is a preprocessor directive in C++ that marks the end of a conditional compilation block. It is used to close directives like #ifdef.
In C++, #define is a preprocessor directive used to define macros, which are essentially symbolic names or code substitutions. These macros help in making the code more readable and maintainable.
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