Error: no match for operator=

[ElleJay]

I want to initialize a hash table but I keep getting an error. How do i properly access elements from HashTables?

//HashTable struct
struct HashTable {
	Condition elements [MAX_ELEMENTS];
	int sizeTable;
};

//Condition struct
struct Condition {
	string conditionName;
	int priority;
};

//Hash Table initialization
  HashTable * initHT (int sizeTable) {
	
	// write code to create a new hash table with the given size, initialize the hash table, and return the address of the hash table created.
        HashTable *ht= new HashTable; 

        int i;
       	for (i=0; i<sizeTable; i++) {
         	ht->elements[i]=NULL;     //error: no match for operator=  
     	}
       	ht->sizeTable = sizeTable;
return ht;
}

[Peter87]

NULL is used with pointers.
elements contains Condition objects, not pointers.

[Ganado]

HashTable::elements is an array of Condition objects.

You tell us, what does it mean to assign NULL to an object of type Condition?
If you just want some sane initial values, you could just do

for (int i = 0; i < sizeTable; i++) {
    ht->elements[i].priority = 0;
}

(std::strings by default are already empty)

Alternatively, you could change your struct to be:

struct Condition {
	string conditionName;
	int priority {};
};

which will automatically zero-initialize the int.

[ElleJay]

Oh ok, I thought you had to outright state you want the strings empty. Thanks for the info

[seeplus]

Consider:

//Condition struct
struct Condition {
	string conditionName;
	int priority {};
};

//HashTable struct
struct HashTable {
	Condition elements[MAX_ELEMENTS] {};
	int sizeTable {};

	HashTable(int s) : sizeTable(s) {}
};


//Hash Table initialization
HashTable* initHT(int sizeTable)
{
	return new HashTable {sizeTable};
}

to default init the hashtable to a specified size.