hi there.
I'm new to c++ programming.
First I have a question. If I "economy" variables, this make program run
faster? or nothing has changed?

ex
1)

int a,b,c,d;
cin>>a;
cin>>b;
cout<<"sum: "<<a+b;

cin>>c;
cin>>d;
cout<<"multiplication: "<<c*d;


2)

int a,b;
cin>>a;
cin>>b;
cout<<"sum: "<<a+b;

cin>>a;
cin>>b;
cout<<"multiplication: "<<a*b;



it makes difference because in the example2 I used only two variables and in example1 4 variables?
The question is if it have an effect in larger source codes.

?