lab4_54

#include <iostream>
#include <math.h>
using namespace std;

int main() {
    int n;
     double sum=0.0;
     cout<<"Input a number"<<endl;
     cin>>n;
     
     for(int i=1;i<=n;i++)
    {
        sum+=1./i;
    }
    cout<<"Sum="<<sum<<endl;
    return 0;
}