hdu 1064 水题

求12个浮点数的平均值

#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>#include <algorithm>#include <cmath>using namespace std;int main(){    freopen("in.txt", "r", stdin);    //freopen("out.txt", "w", stdout);    double a,sum=0.0;    for(int i=0;i<12;i++)    {        cin>>a;        sum +=a;    }    cout<<"$"<<sum/12.0<<endl;    return 0;}