#include<iostream>
#include<iomanip>
#include<math.h>
using namespace std;
int main()
{
int a[10]; int i, j; double sum=0,t;
for (int i = 0; i < 10; i++)
{
cin >> a[i];
double b[10]{ 28.9,32.7,45.6,78.0,35.0,86.2,27.8,43.0,56.0,65.0 };
for (int j = 0; j < 10; j++)
t = a[i] * b[j];
sum += t;
}
cout << fixed << setprecision(1) << sum << endl;
return 0;
}
此处少了一个等号