How to total the price from looping?
Hey guys how can I total the price from doing multiple loops? The total price is taken from the very last loop. I want to total the purchases together into one big total amount to pay for the user. Maybe I made my code harder on myself than it should be. Please help me with any examples and advice.
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Hi,
Firstly, initialize your (total) with 0 ('cause it will start with some random value if left uninitialized) :
Firstly, initialize your (total) with 0 ('cause it will start with some random value if left uninitialized) :
double total = 0;
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You may want to continue shopping for a number of times, so the total price adds up. So we use addition operation instead of assignment operation.
Additionally, to make this "continue shopping or checkout" happens, add a while loop. Here is the place you put it :
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And close the loop with a curved bracket (}) :
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Last edited on
I noticed you have some while-loop lines - but it would be better if you removed them :
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closed account 5a8Ym39o6,
Thank you! That seems to get my program going in the right direction with what I wanted!
The only concern I'm having though is that I want the user to enter either "continue" or "checkout" as the only two options. As it is now, any response other than "continue" will stop the loop and process the program to end. How can I flag the user if he doesn't enter "checkout" when the user actually checks out? For example if the user enters "no" it does the same thing as checking out. I want only typing "checkout" to actually check out the total purchase. Any other input such as "no" I want the program to flag something like: "Sorry! Please either continue shopping or checkout." Any help will be appreciated.
Thanks,
MisterTams
Thank you! That seems to get my program going in the right direction with what I wanted!
The only concern I'm having though is that I want the user to enter either "continue" or "checkout" as the only two options. As it is now, any response other than "continue" will stop the loop and process the program to end. How can I flag the user if he doesn't enter "checkout" when the user actually checks out? For example if the user enters "no" it does the same thing as checking out. I want only typing "checkout" to actually check out the total purchase. Any other input such as "no" I want the program to flag something like: "Sorry! Please either continue shopping or checkout." Any help will be appreciated.
Thanks,
MisterTams
> I want the program to flag something like: "Sorry! Please either continue shopping or checkout."
Use another while-loop to wrap the customer's decision :
Use another while-loop to wrap the customer's decision :
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closed account 5a8Ym39o6,
Thank you very much! I haven't made the change on my program yet, but I totally see what the while loop will accomplish for flagging the user's input. The only other question I have is this: does (1) have to be next to while? Or could the parenthesis possibly be empty? Is (1) simply there to tell the program to run the while loop without a specific term such as used at the beginning of the program with while(response == "continue")?
Thank you very much! I haven't made the change on my program yet, but I totally see what the while loop will accomplish for flagging the user's input. The only other question I have is this: does (1) have to be next to while? Or could the parenthesis possibly be empty? Is (1) simply there to tell the program to run the while loop without a specific term such as used at the beginning of the program with while(response == "continue")?
while(1) is a way to make a program loop forever. Your program continues like that until the loop is terminated by the keywords break or return you write inside the white-loop body.
Hi,
I notice that your code has a lot of repetition, if that is the case then there is always a better way.
There are basically 3 components: the fish species code, it's size and the quantity. So this could implemented using a 2d array - the row is the species, the column is the size with a cell being the unit price. That way you can get the 3 pieces of info at the start, look up the appropriate unit price and then calculate the total.
It's a bit more complicated, but I think a lot better.
Hope this helps :+)
I notice that your code has a lot of repetition, if that is the case then there is always a better way.
There are basically 3 components: the fish species code, it's size and the quantity. So this could implemented using a 2d array - the row is the species, the column is the size with a cell being the unit price. That way you can get the 3 pieces of info at the start, look up the appropriate unit price and then calculate the total.
It's a bit more complicated, but I think a lot better.
Hope this helps :+)
TheIdeasMan,
Thank you for your input! I'm actually a bit interested in trying this if it actually works and would make my code look cleaner. It's been a good while since I've used arrays. I never recall using arrays and then additional cells. Could you possibly show an example using a 2d array for maybe 2-3 fish so I could get the idea down? I would greatly appreciate it. :)
Thanks
Thank you for your input! I'm actually a bit interested in trying this if it actually works and would make my code look cleaner. It's been a good while since I've used arrays. I never recall using arrays and then additional cells. Could you possibly show an example using a 2d array for maybe 2-3 fish so I could get the idea down? I would greatly appreciate it. :)
Thanks
So your problem is solved now? Or you are asking for (extra) advice I think? :)
closed account 5a8Ym39o6,
Yes my main question/concern has been answered by you! Thanks for that! :)
I'm just asking for advice on a different way of coding the program using 2d arrays to get the same effect. :)
Yes my main question/concern has been answered by you! Thanks for that! :)
I'm just asking for advice on a different way of coding the program using 2d arrays to get the same effect. :)
Hi,
Sorry for the late reply, I was busy doing other things yesterday :+)
A simple 2d array of doubles with 3 rows and 3 columns looks like this:
To refer to the second row, second column:
However a better approach may be to have a vector of structs.
To refer to the largest sized "Redear Sunfish" :
In a similar fashion, refer to the species name with: FishPriceTable[1].Species;
So you could have a menu which returns a number which relates to the species - 1 in this case. There could also be a user input for the size - 2 in this case. Then you can look up the price and multiply by the quantity to arrive at a subtotal.
Remember that to make use of
Also, make use of the reference material on this site - look at the links at the top left of this page.
Hopefully you can code the whole thing in 100 Lines Of Code (LOC) :+)
Sorry for the late reply, I was busy doing other things yesterday :+)
A simple 2d array of doubles with 3 rows and 3 columns looks like this:
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To refer to the second row, second column:
std::cout << FishPrices[1][1] remembering that array indices start at zero.However a better approach may be to have a vector of structs.
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To refer to the largest sized "Redear Sunfish" :
std::cout << FishPriceTable[1].SizePrices[2];In a similar fashion, refer to the species name with: FishPriceTable[1].Species;
So you could have a menu which returns a number which relates to the species - 1 in this case. There could also be a user input for the size - 2 in this case. Then you can look up the price and multiply by the quantity to arrive at a subtotal.
Remember that to make use of
std::string and std::vector one has to include their header files: |
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Also, make use of the reference material on this site - look at the links at the top left of this page.
Hopefully you can code the whole thing in 100 Lines Of Code (LOC) :+)
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