What is the output of C code below? #include int main() { int *ptr; int x; ptr = &x; *ptr = 0; printf(" x = %d ", x); printf(" *ptr = %d ", *ptr); *ptr += 5; printf(" x = %d ", x); printf(" *ptr = %d ", *ptr); (*ptr)++; printf(" x = %d ", x); printf(" *ptr = %d ", *ptr); return 0; }