Working with counter-controlled while loops

[W1743625]

Write your question here.

Exercise 1. Write an algorithm (pseudocode) to read a set of sales data items from standard input and calculate and output their total and their average. Prompt user to enter number of data items.

Below is the code that I have written so far but I keep getting an error. What am I doing wrong?

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{

double total, average;
int days;

cout << "How many days do you have sales for?";
cin >> days;
for (int sales = 1; sales <= days; sales++)
{

cout << "Enter the number of sales: ";
cin >> sales;
total += sales;
average = total / days;
}
cout << fixed << showpoint << setprecision(2);
cout << "The total sales are: $" << total << endl;
cout << "The averages sales are: $" << average << endl;

system("pause");

return 0;
}

[tpb]

You need to learn to use [code] [/code] tags and you need to give a better problem description than "i keep getting an error". Compiler error? Linker error? Segfault? Logic error? What input? What output? What is it doing wrong? What was it supposed do?

[Satan]

Notice total += sales that is equivalent to total = total + sales
But what happens in the first iteration of the for loop? total is being assigned total + sales, but what is total's value?

Just initialize total to 0 and you should be good. ;)
(double total=0, average;)

[W1743625]

i get "cout is ambiguous" as an error

[W1743625]

I will try that Nwb

[W1743625]

This is what I have now and I need to.......

Exercise 2. Create a test data set to verify your algorithm. How many cases are needed? Explain.

How do I create the test data? ( I know this may sound like a stupid question)



#include <iostream>
#include <iomanip>
using namespace std;

int main()
{

double total=0, average;
int days;

cout << "How many days do you have sales for? ";
cin >> days;
for (int count = 1; count <= days; count++)
{
double sales;
cout << "Enter the number of sales for day " << count << ": ";
cin >> sales;
total += sales;
average = total / count;
}
cout << fixed << showpoint << setprecision(2);
cout << "The total sales are: $" << total << endl;
cout << "The averages sales are: $" << average << endl;

system("pause");

return 0;
}

[tpb]

Edit your post and put repaste your code in code tags like this:

[code]
your code goes here
[/code]

otherwise it's unreadable.

[Satan]

"cout is ambiguous" is a common compiler error I have had it happen to me twice, I don't know the exact reason why it happens.. But rebooting my compiler seemed to work (I use Microsoft VS 2017).

Your exercise 2 involves nothing but giving sample inputs and checking whether the program and its logic works. That's it.

I think what they want you to do is handle unexpected situations like entering a negative value, not entering a number etc. See what errors you can think of and handle them. If you didn't get something you can always ask use. ;)