//Evaluating complex expressions.
  #include <iostream.h>
 int main()
 {
 int a=0, b=0, x=0, y=35;
 cout << "a: " << a << " b: " << b;
 cout << " x: " << x << " y: " << y << endl;
 a = 9;
 b = 7;
 y = x = a+b;
 cout << "a: " << a << " b: " << b;
 cout << " x: " << x << " y: " << y << endl;
 return 0;
 }