Section 11: Branching and Looping174
  2.
Write a program that will calculate the gas and oil cost for Linda Leadfoot’s planned vacation. The car gets about 33 miles per gallon but uses a quart of oil every 350 miles. Use a conditional test to see if the mileage is greater than 350 miles. The following flowchart will help you write the program.
Run the program to find the oil and gas cost for Linda’s proposed trip to Seattle, Washington. The round-trip is 494 miles. Oil is $0.75 per quart and gas is $0.69 per gallon.
(Answers: Oil cost is $1.06 and gas is $10.33.)
 
           
Start
                     
                                 
                                 
                                   
         
Prompt for & input
total mileage
         
Multiply by R02
   
                           
                           
Pause to display oil cost
(Label output if you wish)
   
         
Store in R01
             
                                   
         
Place 350 in Y-register
         
LBL 01
   
                                   
       
Y
Y
Yes
Yes
Is
mileage ≤ 350?
Yesxxx          
Prompt for &
input gas cost
   
Go to LBL 01
           
     
Store in R03
Recall mileage &
divide by 33
Multiply by R03
Pause to display total gas cost
(Label ouput if you wish)
Stop
   
  No     No                
         
Prompt for &
input oil cost
             
                       
                                 
         
Store in R02
             
                                 
         
Recall mileage &
divide by 350