[GCC] array sum function

#include "stdio.h"
#include "stdlib.h"

int sum (int *,int);

int main()
{
    int i[]={10,20,30,40,50};
    int total;
    total = sum (i ,sizeof(i)/sizeof(i[0]));
    printf("Sum of Array i is %d\r\n",total);
    return 0;
}

int sum(int *p,int n)
{
    int k,total=0;
    for(k=0; k < n; k++)
        total +=*(p+k);
    return total;
}

=====Result=====

Sum of Array i is 150