Part array sum(top)

#include <stdio.h>
#include <math.h>
#define SIZE 5

//https://otvet.mail.ru/question/211269192 – this time 10.30 to 1.30(as in clock)
//sum for part of array - top of it!

void pop_arr(int *,int);
void pr_arr(int *,int);

int main()
{
    int i,j,arr[SIZE][SIZE],total,step = 0;
    total = 0;

    for(i=0;i<SIZE;i++)
    {
        for(j=0;j<SIZE;j++)
        {
            arr[i][j]= SIZE*i+j;
            printf("%d\t",arr[i][j]);
        }
        printf("\n");
    }

    for(i = 0;i<=SIZE/2+1;i++)
    {
        for(j = 0;j<SIZE;j++)
        {
            if(j>=step&&j<SIZE-step)
                {total+=arr[i][j];printf("%d\t",arr[i][j]);}
        }
        printf("\n");
        step++;
    }
    printf("total is %d now\n",total);

    return 0;
}