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Re:哪位高手给看一下吧,怎么是RE?给的数据都测过了In Reply To:哪位高手给看一下吧,怎么是RE?给的数据都测过了 Posted by:Greepry at 2008-11-20 21:41:45 > #include<iostream>
> #include<cmath>
> using namespace std;
> int main()
> {
> char a;
> double sum;
> int i,j,s=1,num[50];
> while(s>0)
> {
> s=0;
> for(i=0;;i++)
> {
> a=cin.get();
> if(a=='\n') break;
> else
> {
> num[i]=a-48;
> s+=num[i];
> }
> }
> if(s==0) break;
> sum=0;
> for(j=0;j<i;j++) sum+=num[j]*(pow((float)2,i-j)-1);
> cout << sum << endl;
> };
> system("pause");
> }
你这个1.system("pause")没必要吧,2.你求2^i的时候用浮点数有误差吧,你可以先把2^i存在一个整形数组中嘛,不放心的话用__in64或者用unsigned __int64嘛,不多,
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