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求RE合理解释。#include<stdio.h> #include<iostream> #include<algorithm> using namespace std; double a[50000]; int main() { int i,n1,n2,n; double sum; while(scanf("%d%d%d",&n1,&n2,&n),n1+n2+n>0) { for(i=0;i<n;i++) scanf("%lf",&a[i]); sort(a,a+n); for(i=n2,sum=0;i<=n-n1-1;i++) sum+=a[i]; printf("%.6f\n",sum/(n-n1-n2)); } return 0; } Followed by:
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