C++ help???

i want to fix the errpr and make the program run


#include%26lt;iostream%26gt;


using namespace std;


double sum( double * begin, double * end) {


double *p = begin;


double result = 0;


while (p != end) {


result += *p++;


}


return result;


}


int main()


{


double *first,*last;


cout%26lt;%26lt;"enter the begin of the array \n";


cin%26gt;%26gt;* first;


cout%26lt;%26lt;"enter the last item in the array \n";


cin%26gt;%26gt;* last;


cout%26lt;%26lt;sum(* first,* last);


system("pause");


return 0;


}

C++ help???
#include%26lt;iostream%26gt;


using namespace std;


double sum( double * begin, double * end) {


double *p = begin;


double result = 0;


while (result %26lt; *end) { // %26lt; end


result += *p+result;


}


return result;


}





int main()


{


double first,last;


cout%26lt;%26lt;"enter the begin of the array \n";


cin%26gt;%26gt;first;


cout%26lt;%26lt;"enter the last item in the array \n";


cin%26gt;%26gt;last;


cout%26lt;%26lt;sum(%26amp;first,%26amp;last);


system("pause");


return 0;


}