Question

Why is the output for LowestSales a negative number? I am using Visual Studio.

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int main()
{
   const int STORE = 10;
   double Sales[STORE];//array for sales
   double HighestSales = Sales[], LowestSales = Sales[]; //arrays to capture highest and lowest sales
   double AverageSale = 0.00; //stores average sale amount

   for (int i = 0; i < 10; i++) // gather sales from 10 stores
   {
       cout << "Enter Store " << (i + 1) << " daily sales: \n";
       cin >> Sales[i]; //prompt the user to enter the daily sales
  
       int HighStoreNo = 0, LowStoreNo = 0; //initialize variables for high store number and low store number

       if (HighestSales > Sales[i] && (isdigit(Sales[i]) != 0) //check to see if this the highest sale, and check for positive integer
       {
           HighestSales = Sales[i]; //assign value to array member to store 'highest sales'
           HighStoreNo = i; //if highest value, assign stored value
       }
       if    (LowestSales <= Sales[i] && (isdigit(Sales[i]) != 0); //assign value to array member to store 'lowest sales'
               LowestSales = Sales[i];
               LowStoreNo = i;   //if lowest value, assign stored value
       }
  
   AverageSale += Sales[i]; //keep accumulating sales total

   }
   cout << fixed << showpoint << setprecision(2);//sets output precision to two decimals
   AverageSale = AverageSale/10; //calculate the average sale by dividing by 10 stores
  
   cout << "Highest Sale: " << HighestSales << ", Store number: " << (HighStoreNo + 1) << endl; //highest sale
   cout << "Lowest Sale: " << LowestSales << ", Store number: " << (LowStoreNo + 1) << endl; //lowest sale
   cout << "Average Sale: " << AverageSale << endl; //average sale

Answer 1

Code - corrected

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

int main()
{
const int STORE = 10;
double Sales[STORE];//array for sales
double HighestSales =0, LowestSales = 999999; //arrays to capture highest and lowest sales
double AverageSale = 0.00; //stores average sale amount
   int HighStoreNo = 0, LowStoreNo = 0; //initialize variables for high store number and low store number

for (int i = 0; i < 10; i++) // gather sales from 10 stores
{
cout<< "Enter Store " << (i + 1) << " daily sales: \n";
cin>> Sales[i]; //prompt the user to enter the daily sales
  
HighStoreNo = 0;
       LowStoreNo = 0; //initialize variables for high store number and low store number

if(HighestSales < Sales[i] && Sales[i]>=0) //check to see if this the highest sale, and check for positive integer
{
HighestSales = Sales[i]; //assign value to array member to store 'highest sales'
HighStoreNo = i; //if highest value, assign stored value
}
if(LowestSales > Sales[i] && Sales[i]>=0){ //assign value to array member to store 'lowest sales'
LowestSales = Sales[i];
LowStoreNo = i; //if lowest value, assign stored value
}
  
AverageSale += Sales[i]; //keep accumulating sales total

}
cout<< fixed << showpoint << setprecision(2);//sets output precision to two decimals
AverageSale = AverageSale/10; //calculate the average sale by dividing by 10 stores
  
cout<< "Highest Sale: " << HighestSales << ", Store number: " << (HighStoreNo + 1) << endl; //highest sale
cout<< "Lowest Sale: " << LowestSales << ", Store number: " << (LowStoreNo + 1) << endl; //lowest sale
cout<< "Average Sale: " << AverageSale << endl; //average sale

return 0;
}

Screenshots -

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