Objective

Extract fields value, damage, ItemType type, and last from items.json and save in the Item struct.

Prerequisites

This project requires that the MUD program from project $5$ is working and passing the tests related to movement and viewing the player's inventory.

Upgraded to C$++,$ alter Makefile, and verify it compiles

The Mud Shop functionality of this level will be written in C$++$Your program from level $5$ has been converted to a C$++$ program $($we just renamed all the $.$C files to $.$cpp$)$Use cdhw to change to your work area $($if accessing via remote terminal$).$create a shop.h and shop.cppIn the Makefile

Change all the $.$c extensions to $.$cppAdd shop.o to OBJSChange the main.bin target's compiler from CC to CXX$,$ which will use the g$++$ compiler instead of gccTo the bottom of the dependencies list, add shop.o: shop.h

Run make to verify the conversion was successful.

If it did not compile because of a malloc statement causing an invalid conversion from void $*,$ this is caused by a slight difference between C and C$++.$ C$++$ is requiring that malloc specifically cast the result to match the pointer.To fix, use casting to change the return type to match the variable being allocated.

Example

$//$ Add a cast to the malloc changing Room $*$rooms $=$ malloc$($sizeof$($Room$)*($roomMaxId$+1))$; $//$ to the following, which now has a $($Room$*)$ just after equals sign Room $*$rooms $=($Room$*)$ malloc$($sizeof$($Room$)*($roomMaxId$+1))$;

It should now be compiling.

Create an enum in data.h

Add the following enum to data.h

typedef enum ItemType $\{$ ITEM$\_$TYPE$\_$NONE$=-1,$ ITEM$\_$TYPE$\_$GENERAL, ITEM$\_$TYPE$\_$QUEST, ITEM$\_$TYPE$\_$POTION, ITEM$\_$TYPE$\_$WEAPON, ITEM$\_$TYPE$\_$ARMOR $\}$ ItemType;

Upgrade Item struct in data.h

$7$The Item struct needs some new fields

int value; $//$ the value of the item int damage; $//$ damage the item does when used as a weapon ItemType type; $//$ the type of item, general, quest, potion, weapon, armor bool last; $//$ marks the last item in the items list

Update load$\_$json$\_$items in data.cpp to load the new fields

value and damage will use extract$\_$inttype will need a new function that equates general, quest, potion, weapon, armor to their enum counterparts.last is used to identify the last record in the array, so it will be false for all records except the last with an id $>-1$One approach for setting last would be to track a lastValidItemId

If you are not a student in the class, then don't use last here, use a hardcoded macro variable with the value $1600$ called MAX$\_$JSON

Each time the code finds an Id$,$ then set the lastValidItemIdAfter the loop, set the last value for the item at the index of lastValidItemId to true

Update main$()$ in main.cpp to print out the new fields

Update the printf for the items

Add the new data for value, damage, type, last

This should result in item $1697$ looking like this:

$1697$ Crimson Sword $10409732031$

Get the flag by running tester and passing all the tests.