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Question
Computer Science
Posted 2 months ago
Given the following code snippet, what is true about the statement ptr
_
num
+
+
?
int num 
[
5
]
=
{
1
,
2
,
3
,
4
,
5
}
;
int 
*
*
 ptr
_
num 
=
 num;
ptr
_
numt
+
;
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Answer from Sia
Posted 2 months ago
c
Explanation
The statement "ptr_num++" increments the pointer "ptr_num" so that it points to the next integer in memory. However, since "ptr_num" is a pointer to a pointer, this code will not compile as intended. The correct declaration should be "int *ptr_num = num;" to point to the first element of the array.
Step-by-step Instruction
Correct the declaration of `ptr_num` to `int *ptr_num = num;` to point to the first element of the array
Explain that `ptr_num++` will then correctly increment the pointer to point to the next element in the array `num`
Time Complexity
The time complexity is not applicable here as we are not discussing an algorithm with multiple steps or iterations.
Space Complexity
The space complexity is constant (O(1)) as the space used does not depend on the size of the input.

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