#include "stdafx.h"
#include <list>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
list<float> *lst = new list<float>();
_tprintf_s(_T("Enter a floating point number or a non-number to end.\n"));
float d;
for (int i = 1;;i++)
{
_tprintf_s(_T("Element %4d: "), i);
if (_tscanf_s(_T("%f"), &d) == 1)
{
lst->push_back(d);
}
else
break;
}
int i = lst->size();
if (i > 0)
{
i--;
int li = -1;
for (list<float>::reverse_iterator it=lst->rbegin(); it != lst->rend(); it++, i--)
{
d = *it;
if (d > 0)
{
li = i;
break;
}
}
float avg = -1;
if (li > 1)
{
i = 1;
int j = 0;
float sum = 0;
bool b = false;
for (list<float>::iterator it=lst->begin(); (it != lst->end()) && (i <= li); it++, i++)
{
d = *it;
if (b)
{
if (i % 2 == 0)
{
j++;
sum += fabs(d);
}
}
else if (d < 0)
b = true;
}
if (j > 0)
avg = sum / j;
}
_tprintf_s(_T("\nArray:"));
for (list<float>::iterator it=lst->begin(); it != lst->end(); it++)
{
d = *it;
_tprintf_s(_T(" %f"), d);
}
if (avg < 0)
_tprintf_s(_T("\nAvg: N/A\n"));
else
_tprintf_s(_T("\nAvg: %f\n"), avg);
}
else
_tprintf_s(_T("You haven\'t entered any number  \n"));
delete lst;
return 0;
} |
