Question

here’s a simple and short code I’ve been trying to run:

#include <stdio.h>

int const SIZE = 5;

void a(int *arr);

int main(){
    int arr[5] = {1,2,3,4,5};
    a(arr);
    return 0;
}

void a(int *arr){
    int *i;
    for (i=arr; i<&a[5]; i++)
            printf("%d",*arr[i]);
}

and i get the following errors/warnings:

main.c: In function ‘main’:
main.c:15: error: variable-sized object may not be initialized
main.c:15: warning: excess elements in array initializer
main.c:15: warning: (near initialization for ‘arr’)
main.c:15: warning: excess elements in array initializer
main.c:15: warning: (near initialization for ‘arr’)
main.c:15: warning: excess elements in array initializer
main.c:15: warning: (near initialization for ‘arr’)
main.c:15: warning: excess elements in array initializer
main.c:15: warning: (near initialization for ‘arr’)
main.c:15: warning: excess elements in array initializer
main.c:15: warning: (near initialization for ‘arr’)
main.c: In function ‘a’:
main.c:22: error: subscripted value is neither array nor pointer
main.c:23: error: array subscript is not an integer

the warning are all associated with the initialization of the array: if I put ‘5’ instead of ‘SIZE’ its ok, why?
The errors in a I don’t get at all. I’m passing a pointer as an arguments, where’s the problem? thatnks!

Answer 1

Firstly, that should be:

for (i=arr; i<&arr[5]; i++)
               ^^^

But secondly, i is not an index, it’s a pointer. So your print statement should be:

printf("%d",*i);