#include <stdio.h>
#include <iostream>

using namespace std;

#define SIZE  100000
#define INDEX 12

typedef struct {
    int array[SIZE];
} BigStruct;

void proc(BigStruct b)
{
    for (int i = 0; i < SIZE; i++) {
        b.array[i] = -b.array[i];
    }
}

int main()
{
    BigStruct big;

    for (int i = 0; i < SIZE; i++) {
        big.array[i] = i;
    }

    printf("Before proc: big.array[%d] = %d\n", INDEX, big.array[INDEX]);
    proc(big);
    printf(" After proc: big.array[%d] = %d\n", INDEX, big.array[INDEX]);
}