C++程序设计实践指导1.12数组中数据线性变换改写要求实现

改写要求1：分别用指针pa、pb代替数组

改写要求2：从键盘输入data元素 元素个数任意，输入0结束

#include <cstdlib>
#include <iostream>

using namespace std;
class DATA
{
      double *pa,*pb;
      double max,min;
      double new_max,new_min;
      int length;
      public:
             DATA(double a1[],double x,double y,int len)
             {
                  int i;
                  length=len;
                  pa=new double[len];
                  pb=new double[len];
                  for(i=0;i<length;i++)
                          pa[i]=a1[i];
                  new_max=x;
                  new_min=y;
                  max=min=pa[0];
                  for(i=0;i<length;i++)
                  {
                     if(pa[i]>max)
                     max=pa[i];
                     if(pa[i]<min)
                     min=pa[i];
                  }
             }
             void fun();
             void print()
             {
                  while(*pa!='')
                  cout<<*pa++<<'	';
                  cout<<endl;
                  cout<<"["<<new_min<<","<<new_max<<"]"<<endl;
                  while(*pb!='')
                  cout<<*pb++<<endl;
             }
};
void DATA::fun()
{
     for(int i=0;i<length;i++)
      pb[i]=(pa[i]-min)*(new_max-new_min)/(max-min)+new_min;
}
int main(int argc, char *argv[])
{
    int i,j=0;
    cout<<"输入元素个数"<<endl; 
    cin>>i;
    double *data=new double[i+1];
    int x,y;
    cin>>data[0];
    while(data[j])
    {
           j++;
           cin>>data[j];  
    }
    while(*data!='')
    cout<<*data++<<'	';
    cout<<endl;
    cout<<"输入x，y"<<endl;
    cin>>x>>y;
    DATA test(data,x,y,i);
    test.fun();
    test.print();
    system("PAUSE");
    return EXIT_SUCCESS;
}