int     n;
int    *p, *q;

p = &n;
*p =  5;
*q = 17;
q =  p;
*q =  8;

int main(void) {
    int scanfResult;
    int a, b, c;
    scanfResult = scanf("%d %d %d", &a, &b, &c);
    printf("%d %d %d %d", scanfResult, a, b, c);
}

void swap (int x, int y);

int main(void) {
    int x = 10;
    int y = 99;
    
    printf("%d %d\n",x,y);
    
    swap(x,y);
    
    printf("%d %d\n",x,y);
    

    return EXIT_SUCCESS;
}

void swap (int x, int y) {
   int tmp;
   tmp = x;
   x = y;
   y = tmp;
}

1. What will the output be and why?

2. Modify the code so that the function prototype is void swap (int *x, int *y);

3. What will the output of the modified code be and why?

float ff[] = {1.1, 2.2, 3.3, 4.4, 5.5, 6.6};
float *fp = ff;

What are the similarities between ff and fp? What are the differences?

int x = -9;
int *p1 = &x;
int *p2;

p2 = p1;
printf("%d\n", *p2);
*p2 = 10;
printf("%d\n",x);

-9
10

void sumProd(int nums[], int len, int *sum, int *product);