I was asked to use try-catch exception handling to handle the case if the list o

ID: 3685799 • Letter: I

Question

I was asked to use try-catch exception handling to handle the case if the list of students is empty. I'm new to c++ so can anyone guide me?

double classAverage()
{
   int count = 0;
   double sum = 0.0;
   Container *temp = list;
   if (temp == NULL)
   {

       cout << "List empty!";
       return -1.0;
   }

while (temp != NULL)
{

           sum += temp->student->getGrade();
           temp = temp->next;
           count++;
       }
       return sum / count;
}

Explanation / Answer

#include <iostream>
using namespace std;
double classAverage()
{
int count = 0;
double sum = 0.0;
Container *temp = list;
if (temp == NULL)
{

throw "list of students is empty!";
}
while (temp != NULL)
{
sum += temp->student->getGrade();
temp = temp->next;
count++;
}
return sum / count;
}

int main ()
{
double average = 0;
try
{
average = classAverage();
cout << average << endl;
}
catch (const char* msg)
{
cerr << msg << endl;
}

return 0;
}

NOTE: if you given full prog i can give you output, (Container is not implemented)

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