// Solution to Lab8, problem 1:

#include<iostream.h>

int main()
{
  // declare integer variables x and y.
  int x;
  int y;
  // prompt user, and take input for variable x.
  cout << "Enter an integer: ";
  cin >> x;

  // assign y to 2*x.
  y = 2*x;
  // if x is between -10 and +10, double the value of x (change x)
  //   otherwise, (using a nested if statement), test if the value of
  //   x is negative (< -10) or positive.  If it's negative, set x to
  //   to -10 and print a message "x has been set to -10", otherwise, set
  //   x to 10 and print "x has been set to +10".

  if ( (x >= -10) && (x <= 10) )
    { x = x*2; }
  else 
    {  if (x < 0)
          { x = -10;
	    cout << "x has been set to -10";
	  }
       else
	 { x = 10;
  	   cout << "x has been set to +10";
         } // end of inner if-else
    } // end of outer if-else

  // Print out the final values of x and y, indicating which is which     
  cout << "x == " << x << " and y == " << y << "\n";
  return 0;
}