练习一

#include<iostream>
using namespace std;
const int Max = 5;

int fill_array(double ar[],int limit)
{
using namespace std;
double temp;
int i;
for(i=0;i<limit;i++)
{
cout<<"Enter value#"<<(i+1)<<":";
cin>>temp;
if(!cin) //bad input
{
cin.clear();
while(cin.get() != '\n')
{
continue;
}
cout<<"Bad input; input process terminated.\n";
break;
}
else if(temp<0)
{
break;
}
ar[i]=temp;
}
return i;
}

void show_array(const double ar[],int n)
{
using namespace std;
for(int i =0;i<n;i++)
{
cout<<"Property#"<<(i+1)<<":$";
cout<<ar[i]<<endl;
}
}

void revalue(double r,double ar[],int n)
{
for(int i=0;i<n;i++)
{
ar[i] *= r;
}
}

int main()
{
using namespace std;
double properties[Max];

int size = fill_array(properties,Max);
show_array(properties,size);
if(size>0)
{
cout<<"Enter revaliuation factor:";
double factor;
while(!(cin>>factor)) //badinput
{
cin.clear();
while(cin.get() !='\n')
{
continue;
}
cout<<"bad input,pleaes enter a number!"<<endl;
}
revalue(factor,properties,size);
show_array(properties,size);
}
cout<<"Done.\n";
cin.get();
cin.get();
return 0;
}