题解简单易懂

#include<bits/stdc++.h>
using namespace std;
int main(){
int a[10];
double sum,b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
for(int i=0;i<10;i++){
cin>>a[i];
}
for(int i=0;i<10;i++){
sum+=a[i]*b[i];
}
printf("%.1f",sum);
}