1 #include<iostream> 2 #include<stdio.h> 3 using namespace std; 4 #include<iomanip> 5 6 double j(int n); 7 int main() 8 { 9 double sum = 0; 10 cout<<"n e"<<endl; 11 cout<<"- -----------"<<endl; 12 for(int i = 0; i <= 9; i++) 13 { 14 sum += 1.0/j(i); 15 cout<<i; 16 if(i>=3) 17 cout<<setiosflags(ios::fixed)<<setprecision(10)<<" "<<sum<<endl; 18 else 19 cout<<" "<<sum<<endl; 20 } 21 } 22 double j(int n) 23 { 24 double sum = 1; 25 if(n == 0) 26 return 1; 27 for(int i = 1; i <= n ;i ++) 28 { 29 sum *= i; 30 } 31 return sum; 32 }
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