CMSC 201 		SAMPLE TEST 1		Name _______________			
Total Points:  100				Point values in margin.


(10) 1.  Use the following variables to write a single C++ statement 
	 for each task:

	float root, a, b, c;

	a)  Assign to variable root one value given by the quadratic formula. 


	b)  Display the value of root on the screen in a field of width 
	    20 columns with 4 decimal places after the decimal point.

	   Assume that these statements have been executed:
	   cout.setf(ios :: fixed, iso :: floatfield);
	   cout.setf(ios :: showpoint);




(10) 2.  Fill in the blanks.

	Name a person at AT&T Bell Labs who was part of the history 
	of C++:__________________.

	The history of C++ is closely related to the development of 
	this operating system: __________________.
	
	In C++ an expression is: ____________________________________. 		

	Each function has two parts, called __________________ and
 	__________________.

	Before compilation occurs, your C++ code is handled by the
 	__________ whose directives all begin with this symbol__________.

	Your C++ source code is called a source file.  The compiler 
	produces the__________________file.  The linker produces the
	__________________file.

	Name 3 kinds of control in program execution of statements.
	__________________, __________________, __________________. 

	Tell what is in a function prototype: _________________                           

(10) 3.  Give the exact output for the following program.
	
	# include < iostream.h >
	int main(void)
	{
	 	int a, b, c;
		a = 13;
		b = 5;
		c = 2;

		cout <<  a % b  <<  endl;				

		cout <<  a / c  <<  endl; 			
		
		cout << ( a > c ) <<  endl;
						
		cout << ( a == c ) <<  endl;
							
		c++;

		cout <<  c  <<  endl;
							
		if (a = 15) 
		{	
			cout << "ONE" << endl;
		}
		else
		{	
			cout << "TWO" << endl;
		}								
			
		return 0;
	}


(10) 4. a)  Convert the integral value 18 to binary.  
	    Show how it would be stored using 8 bits.


	b)  Convert the integral value -18 to binary in two's
 	    complement form.  
	    Show how it would be stored using 8 bits.


	c)  Convert float value 13.25 to normalized binary form.
  	    Indicate what is the exponent and what is the mantissa
 	    (significand).



(10)  5.  Assume these statements.   
	  Give the value for each expression below.		    
	  Tell whether or not short circuiting occurs in evaluation.
		
		int Age, Height;

		Age = 35;
		Height = 70;

	EXPRESSION		   

     (Age <= 20) && (Height > 60)	    							

     (Age <= 20)  ||  (Height > 60)	    							
	
     ! (Age > 50)  &&  ( Height < 72) 	    							
      
(10) 6.  Assume that these variable declarations have been made:

	float Wage, Hours, Years;
		
	Write an if...else statement to do the following.  
	If the value of variable Years is less than 20, you should 
	assign to variable Wage the value 6.15, and assign to variable 
	Hours the value 37.5.  Otherwise, you should assign to Wage 
	the value 10.75, and assign to Hours the value 40.0



(10) 7. Write a multiway branching if...else if... statement which
 	prints out a message depending on a patient's blood pressure
 	variable BP.  

	You should print the word "DANGER" if the blood pressure is
	250 or over;
	print the word "HIGH" if the blood pressure is at least 180 
	but less than 250; 
	print the word "NORMAL" if the blood pressure is at least 
	100 but less than 180; 
	print the word "LOW" otherwise.

	int  BP;

(10) 8.  Write a function definition for a function called DisplayStars 
         with return type void, and one parameter Number of type int.
	 Your function body should use a for loop or a while loop. 

NOTE: Some sample function calls and their output are shown below.

	DisplayStars(5);	// prints ***** to screen
	DisplayStars(10);	// prints ********** to screen

 (20) 9.  The local phone company offers 2 types of service:  

	Unlimited service costs $40.50 per month, no matter how many
 	local calls are made  
	Limited service charges a basic rate of $19.38 per month for 
	up to 30 calls, and $0.09 for each additional call.

	The first line of a data file called "A:\PHONE.DAT" contains 
	an area code and an exchange.  

	Each of the remaining lines contains a 'U' or an 'L' to
 	indicate the type of service, the customer's 4 digit number,
 	and the number of local calls made that month.  You do not
 	know how many telephone numbers are in the data file.

"A:\PHONE.DAT" 
 410	780	
 L	4168	130
 L	6543	 13
 U	6578	200
 L	6662	 31
 U	7123	 15
 .	 .	 .
 .	 .	 .
		

Write a program to read data from this input file and create an
output file called "A:\BILLS.DAT" which contains the phone number
and bill for each customer in the following form.

"A:\BILLS.DAT" 
 (410)	780-4168	28.38
 (410)	780-6543	19.38
 (410)	780-6578	40.50
 (410)	780-6662	19.47
 (410)	780-7123	40.50
  .	  .	  	  .
  .	  .	  	  .