Question

//the setup
tiles = new Tile **[num_bands];
for( int i = 0 ; i < num_bands ; i++ )
tiles[i] = new Tile *[num_spokes];  

for(int i=0; i < num_bands; i++){
    for(int ii=0; ii < num_spokes; ii++){
        tiles[i][ii] = 0; 
    }
}


 //the problem
delete tiles[1][1];

When I delete a tile, tiles[1][1] still holds an address. I thought it should be a null pointer or 0x0, but its not. Am I deleting this wrong?

Answer 1

delete isn’t supposed to null the pointer; it’s your own responsibility to do that if you want to.

Basically, delete just means “I no longer need the memory at this address, so you can use it for something else.” – it doesn’t say anything about what value pointers that pointed to the freed address will have.