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大家帮忙看看啊 我到底错在哪??急~~

Posted by xtu6418 at 2006-09-11 15:08:07 on Problem 2871
#include<iostream>
using namespace std;
int main()
{long  double a1,a2;
cin>>a1;
while(1)
{cin>>a2;
if(a2==999)
break;
else
{if((a2-a1)!=0)
printf("%.2f\n",a2-a1);
}
a1=a2;
}
cout<<"End of Output"<<endl;
return 0;
}

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