Why am I getting this error ( redefinition, different basic type) for every function?

this is only one function but I have the same mistake for every function in my program

inventory.c X inventory (Global Scope) 4. Description: */ //precompiler directives #define-CRT-SECURE-NO WARNINGS 7 //to avoid scanf warning or error /printt, scant detinitions E#include 9 10 #include #include #include #define MAX ENTRIES 12 13 14 50 Etypedef struct f 16 17 18 19 20 21 char name [10]; char brand [10]; int ID; int quantity; double price; double average; Sport apparel; 23 24 Eint main() 25 26 27 28 29 30 31 32 Sport_apparel list MAX_ENTRIES]; int size0; printf("Sport Apparel inventory. Inln"); HardCode(list, &size)