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//Tính S(n) = 1 + 1/2 + 1/3 + ... + 1/n ( đệ quy ) !
#include<iostream.h>
#include<conio.h>
#include<math.h>
float cong(float n)
{
if(n==1)
return 1;
if(n>0)
return cong(n-1)+1/n;
}
}
void main()
{
float n;
cout<<"Nhap n = ";
cin>>n;
cout<<"Tong  = "<<cong(n);
getch();
}

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