#c programming

Question

#include<iostream>
using namespace std;

int main()
{
    int a[] = {10,20,30,40,50};
    
    cout<<(*(&a+1)-a);
    
    return 0;
}

how th o/p is  5 ??

Answer 1

let us consider array A[] stored at starting address 1000 and taking int size as 2 bytes.

So when you simply say A it gives you base address of array i.e here 1000

Now your statement as wriiten in cout....... (&A+1 )  will skip whole 1D array means here all 5 elements would be skipped i.e it will be 1000+10=1010, now further we are subtracting A from this means (1010-1000)/2=5

Note: whenever you subtract two addresses it gives number of element between them, so you need to divde by size of each element i.e 2 here.

Comments

can u provide some links to cover this concept ?

Answer 2

.............

Comments

*(&a+1)   what is significance of dereference(*) here ??