#include <iostream>
using namespace std;
//comma_operator1.cpp 
int main()
{
   int n1=1, n2=2, n3=10, i;   
   // oerator comma acts as a separator 
   cout<< "\n n1 = " << n1 << ",n2 =" << n2 << ", n3 =" <<n3 ;
   	cout<<"\n --------() last value ------------------ \n";
   cout<<" \n i stores last value n2 , from i= (n1, n2)";  
   i = (n1, n2);                               
   cout <<"\n i = (n1, n2) :" << i ; 
   cout<<"\t here n1 = " << n1 << " ,n2 = " << n2 ; 
  	 cout<<"\n ----------no paraenthesis, first value ------- \n";
	 cout<<" \n i stores first  value n1 , from i= n1, n2";
   i = n1, n2;               
   cout <<"\n i = n1,n2  : " << i ; 
   cout<<"\t here n1 = " << n1 << " ,n2 = " << n2 ; 
   cout<<"\n -------------------------- \n";
   cout<<"\n increases n1 by 5, then stores n1+n2 = 6+2 into i "; 
   i = (n1 += 5, n1 + n2);    //  ... n1=6, n2=2, i=8
   cout <<"\n i = (n1 += 5, n1 + n2) :" << i  ; 
   cout<<"\n\t \t here n1 = " << n1 << " n2 = " << n2; 
   cout<<"\n -------------------------- \n";
   cout<<"increases n1 by 5, then stores n1 = 6+5 into i "; 
      i = n1 += 5, n1 + n2;      //    ... n1=5, n1+n2=6, i=n1=11
   cout <<"\n i = n1 += 5, n1 + n2  : " << i ; 
   cout<<"\n\t \there n1 + " << n1 << " n2 + " << n2; 
   cout<<"\n -------------------------- \n";
    cout<<"\n i stores first value -----"; 
   i = n1, n2, n3;                                           
   cout <<"\n i = n1 ,n2,n3  :  " << i ; 
   cout<<"\n\t \t here n1 =" << n1 << " n2 = " << n2 << " n3 = " << n3; 
   cout<<"\n -------------------------- \n";
      cout<<"\n i stores last value -----"; 
   i =( n1, n2, n3);                                           
   cout <<"\n i =( n1 ,n2,n3 ) :  " << i ; 
   cout<<"\n\t \t here n1 =" << n1 << " n2 = " << n2 << " n3 = " << n3; 
 return 0; 
}