Error on Multiple Array Dynamic Memory Allocation

Question

please advise why below do not work. use VC2017:

long **l;
l = new long [5][7];

it shows error as:

"a value of type "long*[7]" can not be assigned an entity of long**"...

How can I solve it?

long **l=NULL; l=new long [5][7];

user10293779
– user10293779

2019-01-20 12:47:58 +00:00
Commented Jan 20, 2019 at 12:47 — user10293779
– user10293779, Commented Jan 20, 2019 at 12:47

dWinder · Accepted Answer · 2019-01-20 13:01:50Z

1

You need to declare and init the first array of pointer to long* and then assign to each his own array as:

long** l = new long*[5]; // declare array of pointer of 5 cell
for(int i = 0; i < 5; ++i)
    l[i] = new long[7]; // assign to each cell array with 7 cells

Remember that anything allocated with new is created on the heap and must be de-allocated with delete.

answered Jan 20, 2019 at 13:01

dWinder

11.7k3 gold badges27 silver badges40 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Error on Multiple Array Dynamic Memory Allocation

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related