Question

/* Homework Lab 6

This program does not work. There are three errors that you will need to fix:

TODO: Fix the following 3 errors.

ERROR #1) The compiler knows there is something wrong, and it will issue a
warning and and two error messages, all related to the same problem.
       Read the error and warning messages carefully to point you in the
       right direction. Did you know if you double-click on an error
       message (in the Error List) that it will take you to the spot in
       your program where the compiler detects the problem? Also, get
       in the habit of ALWAYS reading messages carefully. You may not
       understand them right now, but over time you will come to understand
       the messages better and better. One of these three messages will be
       most helpful, but it is still informative to see that the other two
       messages come as a result of this single problem.

ERROR #2) After fixing ERROR #1 your program will run. However, you will get
incorrect results. It will say "Congratulations!" even when not perfect.

ERROR #3)

But when you find and fix that error, something still lurks behind that the
compiler does not complain about and that will give incorrect output. The output
will still display a zero after the decimal point even if it should be .3 or .7...

IMPORTANT NOTE ON ERROR #3: You are NOT allowed to change the data type of any constant
or variable to make this work. You also MUST divide by NUM_OF_SCORES
when calculating the average.
*/

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

//------------------------------------------------------------------------------

int main()
{
   int score1; // To hold three test scores
   int score2;
   int score3;
   double average; // To hold the average score

   const int NUM_OF_SCORES = 3;

   // Get the three test scores.
   cout << "Enter 3 test scores and I will average them: ";
   cin >> score1 >> score2 >> score3;

   // Calculate and display the average score.
   average = (score1 + score2 + score3) / NUM_OF_SCORES;
   cout << fixed << showpoint << setprecision(1);
   cout << "Your average is " << average << endl;

   // Follow up with a message.
   if (average = 100);
       cout << "Congratulations! Those are all perfect scores" << endl;
   else
       cout << "Not perfect yet - Better luck next time." << endl;

   cout << endl;

   return 0;
}

/* Sample program interactions:
------------------------------------------------------------------------------
BEFORE FIXING ERROR #1:
======================
The program will not run!

AFTER FIXING ERROR #1:
======================

Test #1:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 100 100 100
Your average is 100.0
Congratulations! Those are all perfect scores

Press any key to continue . . .

Test #2:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 70 80 90
Your average is 80.0
Congratulations! Those are all perfect scores

Press any key to continue . . .

AFTER FIXING ERROR #2:
======================

Test #1:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 100 100 100
Your average is 100.0
Congratulations! Those are all perfect scores

Press any key to continue . . .

Test #2:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 70 80 90
Your average is 80.0
Not perfect yet - Better luck next time.

Press any key to continue . . .

Test #3 (use calculator to see what this average should be):
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 72 80 90
Your average is 80.0
Not perfect yet - Better luck next time.

Press any key to continue . . .

AFTER FIXING ERROR #3:
======================

Test #1:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 100 100 100
Your average is 100.0
Congratulations! Those are all perfect scores

Press any key to continue . . .

Test #2:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 70 80 90
Your average is 80.0
Not perfect yet - Better luck next time.

Press any key to continue . . .

Test #3:
-----------------------------------------------------------------------------
Enter 3 test scores and I will average them: 72 80 90
Your average is 80.7
Not perfect yet - Better luck next time.

Press any key to continue . . .

*/

Answer 1

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

//------------------------------------------------------------------------------

int main()
{
int score1; // To hold three test scores
int score2;
int score3;
double average; // To hold the average score

const int NUM_OF_SCORES = 3;

// Get the three test scores.
cout << "Enter 3 test scores and I will average them: ";
cin >> score1 >> score2 >> score3;

// Calculate and display the average score.
average = (double)(score1 + score2 + score3) / NUM_OF_SCORES;//eoror3 type casting needed
cout << fixed << showpoint << setprecision(1);
cout << "Your average is " << average << endl;

// Follow up with a message.
if (average == 100)//error1 is semicolon at end and error 2 is relational operator "==" is requried, because '=' operator assigns 100 not checks the condition
cout << "Congratulations! Those are all perfect scores" << endl;
else
cout << "Not perfect yet - Better luck next time." << endl;

cout << endl;

return 0;
}