Submatrix sum code

#1

i am unable to understand the code written under int main of this video and use of double pointers in the sum function.

#2

@aditi2512201012019
hello Aditi,
In main function, sir is allocating 2d array dynamically

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read more about it here ->
https://www.techiedelight.com/dynamic-memory-allocation-in-c-for-2d-3d-array/

#3

but aren’t we already declaring 2d array a[ ][ ] in int ,then why it is required to do this thing.

#4

@aditi2512201012019

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here in main function we have declared it dynamically.

#5

is it necessary to do this dynamically.

#6

or we can do it otherwise also?

#7

@aditi2512201012019
No not necessary, u can use a static 2d array .

#8

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