ZOJ1045&&1048

两道简单题，此外，1049有网友给出的计算公式是 Z=3.14*(x*x+y*y)/100.0+1.0，可惜我不明白其原理

ZOJ1045 HangOver

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->#include<iostream>
usingnamespacestd;
intmain()
{
doubletarget,num,sum;
while(cin>>target&&target!=0.00)
{
sum=0.0f;
num=2;
while(sum<target)
{
sum+=1.0/num;
num++;
}
cout<<num-2<<"card(s)"<<endl;
}
return0;
}

ZOJ1048 Financial Management

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->#include<iostream>
usingnamespacestd;
intmain()
{
doublesum=0.0f,average=0.0f,num;
for(inti=0;i<12;++i)
{
cin>>num;
sum+=num;
}
average=sum/12.0f;
cout<<"$"<<average<<endl;
return0;
}