Fibonacci Series in C++

#include<iostream>
using namespace std;
int main()
{
int i,n,a=0,b=1;
cout<<"Enter range ";
cin>>n;
cout<<a<<" ";
for(i=1;i<n;i++)
{
cout<<b<<" ";
b=b+a;
a=b-a;
}
return 0;
}

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