Mine

// Given an array A and the address of element A[x], find the value of  x#include <stdio.h>#define TESTVALUE 5int main(void){  int x=TESTVALUE;  int A[]={0,1,2,3,4,5,6,7,8,9};  int one_element=sizeof(A[0]);  printf("one_element=%d\n", one_element);  int finding_x=( (unsigned long)(&A[x]) - (unsigned long)(&A[0]) )/one_element ;  printf("Address &A[x]=%p\n", &A[x] );  printf("Address &A[0]=%p\n", &A[0] );  printf("finding_x=%d\n", finding_x);  return 0;}