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Re:遇到一个奇怪的问题,请大家帮帮忙,很简单的In Reply To:遇到一个奇怪的问题,请大家帮帮忙,很简单的 Posted by:abilitytao at 2008-08-16 16:25:57 > #include<iostream> > #include<stdio.h> > #include<math.h> > using namespace std; > int cmp(const void *a,const void *b) > { > return ((*(double*)a)>(*(double*)b))?1:-1; > } > > int main() > { > int n,i,j; > double a[101]; > scanf("%d",&n); > for(i=0;i<n;i++) > scanf("%f",&a[i]);//把这里的f改成lf就对了,为什么呀,有区别么? > if(n==1) > { > printf("%.3f\n",a[0]); > return 0; > } > qsort(a,n,sizeof(a[0]),cmp); > for(i=n-2;i>=0;i--) > { > a[i]=2*sqrt(a[i]*a[i+1]); > } > > printf("%.3f\n",a[0]); > return 0; > } > > > 问题在我的注释里。 Followed by:
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