What is wrong with the second “if “ part ?

Question

#include <iostream>
using namespace std;

int main() {
int a, b, c, d, r, s, n;
cin >> n;
while (cin >>a>>b>>c>>d){
s=b-a;
r=b/a;
if (
b==s+a && c==s+b && d==s+c)
cout << a <<" "<< b <<" "<< c <<" "<< d << " " << d+s <<endl; if(
b==a*r && c==b*r && d==c*r)
cout << a << " "<<b << " "<< c << " "<< d << " "<< d*r <<endl;
}

return 0;
}

Answer 1

You must write what is wrong.
C++ code is valid.
The second if checks whether the entered data are elements of geometric progression.