# include<iostream> # include<iomanip> using namespace std; int main(){ double m,s=0;//m为每月的工资，s为累加器，求12个月工资总和 for(int i=1;i<=12;i++){ cin>>m; s+=m; } cout<<"￥"<<fixed<<setprecision(2)<<s/12<<endl; return 0; }