QA 4 


Q1: Do we need to consider situation where there are two lowest unit prices?
Q2: Do we need to cout the total with delivery as well as without delivery?
Q3: How do I compare and find the min of four unit prices? 
Q4: How do I write comments for a function?
Q5: Do I need comments at the declaration too?
Q6: Can I return a void instead in: double add_tip (double total_price)?
Q7: If the user wants to order another pizza, does the current total need
    zeroed out or added to the new total?
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Q1: Do we need to consider situation where there are two lowest unit prices?

A1: No, your 1st cheaper comparison will assign to best_price the current
unit_price.  If this is .07 then the next comparison  will NOT be 
cheaper, therefore it will be the first cheapest.
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Q2: Do we need to cout the total with delivery as well as without delivery?

A2: Yes need to print total,  Only print word "delivery" if chosen.
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Q3: How do I compare and find the min of four unit prices? 

A3: As in lecture, we said:
a) min gets assigned the first unit price for pizza A calling, best_deal()
b) Then loop thru calling best_deal() for other pizzas B, C, D
c) Test in loop whether cheaper.  If true, assign the new unit price to min
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Q4: How do I write comments for a function?

A4: Please refer to the CSE 9A Lab Guide, last page for a sample of a
"commented" good style program.  Notice that above each function definition 
is a comment explaining its task.  e.g.
   // void show_menu(double, double, double, double)
   // Displays the choice of pizza (A-D) with the corresponding diameter,
   // and the input prices.  The input prices are passed ....
   void 
   show_menu(double, double, double, double)
   { ...  }
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Q5: Do I need comments at the declaration too?

A5: Detailed comments above the function definition and a 1 liner comment
at declaration should do it.  e.g.
                                               // Display menu price & choices
   void show_menu(double prA, double prB, double prC, double prD); 
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Q6: Can I return a void instead in double add_tip (double total_price); ?

A6: Use the function declarations as they are given to you,  PA#4 is based on 
learning functions, return values, and "pass by value".  Returning a double 
helps, because using "pass by reference" in PA#5, things will change!
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Q7: If the user wants to order another pizza, does the current total need
    zeroed out or added to the new total?

A7: No initialization of total to zero.
Please notice the sample output.  The first amount of $10.98 PLUS $15.98
is a total of $26.96 + 15% tip --> $31.00 (We did this in class) 
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