// from http://www.cplusplus.com/reference/cwchar/wcstol/
#include <stdio.h>
#include <wchar.h>

int main () {
  wchar_t wsNumbers[] = L"2001 60c0c0 -1101110100110100100000 0x6fffff";
  wchar_t * pEnd;
  long int li1, li2, li3, li4;

  li1 = wcstol(wsNumbers,&pEnd,10);
  li2 = wcstol(pEnd,&pEnd,16);
  li3 = wcstol(pEnd,&pEnd,2);
  li4 = wcstol(pEnd,NULL,0);

  printf("The decimal equivalents are: %ld, %ld, %ld and %ld.\n", li1, li2, li3, li4);
  return 0;
}