The following code outputs this example include using namesp

The following code outputs this example:

#include

using namespace std;

int main()
{
   int grade;   // letter grade entered by user
   int aCount = 0; // count of A grades
   int bCount = 0;   // count of B grades
   int cCount = 0; // count of C grades
   int dCount = 0; // count of D grades
   int fCount = 0; // count of F grades

   cout << \"Enter the letter grades.\" << endl
       << \"Enter the EOF character to end output.\" << endl;

       //loop until user types end of file key sequence
       while ((grade = cin.get()) != EOF)
       {
       //determine which grade was entered
           switch ( grade ) // switch statement inside nested loop
           {
           case \'A\': // grade was uppercase A
           case \'a\': // or lowercase a
               aCount++; //increment aCount
               break; // exit switch
          
           case \'B\':
           case \'b\':
               bCount++;
               break;

           case \'C\':
           case \'c\':
               cCount++;
               break;

           case \'D\':
           case \'d\':
               dCount++;
               break;

           case \'F\':
           case \'f\':
               fCount++;
               break;

           case \'\ \':
           case \'\\t\':
           case \' \' :
               break;
                  
           default:
               cout << \"Incorrect letter grade entered.\"
                   << \"Enter new grade.\" << endl;
                           break;
} // end switch
       } // end while
   //output results
   cout << \"\ \ Number of students who recieved each letter grade.\"
       << \"\ A: \" << aCount
       << \"\ B: \" << bCount
       << \"\ C: \" << cCount
       << \"\ D: \" << dCount
       << \"\ F: \" << fCount
       << endl;

From what I am understanding, the task is to modify this code so that it will calculate the total gpa of the infromation entered by the user. All of the A\'s are 4, all of the B\'s are 3, all of the C\'s are 2, all of the D\'s are 1, and all of the F\'s are 0. The out put adds the A\'s then divides by the number of entries...same for the rest of the grades.

Enter the letter grades. AZ Number of students who recieved each letter grade. A: 3 B: 2 C: 3 D:2 Press any key to continue . . .

Solution

Please find the modified code below, with its output. Please find the comments.

#include <iostream>
#include <string>

using namespace std;

int main()
{
int grade; // letter grade entered by user
int aCount = 0; // count of A grades
int bCount = 0; // count of B grades
int cCount = 0; // count of C grades
int dCount = 0; // count of D grades
int fCount = 0; // count of F grades
cout << \"Enter the letter grades.\" << endl
<< \"Enter the EOF character to end output.\" << endl;
//loop until user types end of file key sequence
while ((grade = cin.get()) != EOF)
{
//determine which grade was entered
switch ( grade ) // switch statement inside nested loop
{
case \'A\': // grade was uppercase A
case \'a\': // or lowercase a
aCount++; //increment aCount
break; // exit switch
  
case \'B\':
case \'b\':
bCount++;
break;
case \'C\':
case \'c\':
cCount++;
break;
case \'D\':
case \'d\':
dCount++;
break;
case \'F\':
case \'f\':
fCount++;
break;
case \'\ \':
case \'\\t\':
case \' \' :
break;
  
default:
cout << \"Incorrect letter grade entered.\"
<< \"Enter new grade.\" << endl;
break;
} // end switch
} // end while
//output results
cout << \"\ \ Number of students who recieved each letter grade.\"
<< \"\ A: \" << aCount
<< \"\ B: \" << bCount
<< \"\ C: \" << cCount
<< \"\ D: \" << dCount
<< \"\ F: \" << fCount
<< endl;

double totalgpa = ((aCount*4)+(bCount*3)+(cCount*2)+(dCount*1)+(fCount*0))/(aCount+bCount+cCount+dCount+fCount); //find total gpa by multiplying each enrtry with its point and divide total by no:of entries
  
cout << \"Total Gpa = \" << (double)totalgpa << endl;
}

------------------------------------------------

OUTPUT:

Enter the letter grades.
Enter the EOF character to end output.
a
B
c
C
A
d
f
C
D
A
b
1

Number of students who recieved each letter grade.
A: 3
B: 2
C: 3
D: 2
F: 1
Total Gpa = 2