GCC Vectorization Example

#include <time.h>
#include <stdlib.h>
#include <stdio.h>

#define SIZE 1000

void main() {
    srand(time(NULL));

    size_t i;
    int arr1[1000] = { 0 };
    int arr2[1000] = { 0 };
    int arr3[1000] = { 0 };
    long long int sum = 0;

    for (i = 0; i < SIZE; i++)
        arr1[i] = rand() % ((1000) + 1 - (-1000)) + (-1000);

    for (i = 0; i < SIZE; i++)
        arr2[i] = rand() % ((1000) + 1 - (-1000)) + (-1000);

    for (i = 0; i < SIZE; i++)
        arr3[i] = arr1[i] + arr2[i];

    for (i = 0; i < SIZE; i++)
        sum += arr3[i];

    printf("Sum of third array is %d\n",sum);
}