Final answer:
To track the chests the player has found and opened, use a Boolean array initialized with false values. Update the array element that corresponds to the chest just found using a pointer. Check if the fifth element in the array is true to determine if the player has leveled up.
Step-by-step explanation:
To track the chests that the player has found and opened, an array with five Boolean elements can be used. The array should be initialized with all elements set to false to represent that no chests have been found yet. The user should be prompted to input the number of the chest they just found. Using a pointer, the corresponding element in the array can be updated to true, indicating that the chest has been found. Finally, the program should check if the fifth element in the array is true, indicating that the player has found the token required to level up.