Function -> void inputScores(string[], double[][5]); This function populates an

Question

Function -> void inputScores(string[], double[][5]);

This function populates an array of strings with the names in the file.

This function populates a 2D array of doubles with the 5 scores associated with each name.

Function -> void computeAverage(double[][5], double&);

Function -> void computeLetterGrade(double, char&);

Function -> void printGrades(double[][5], string[], double, char);

printGrades should call computeAverage and computeLetterGrade.

The function prototypes using void return type are only suggestions.

There are always different ways to create a program.

You may change the function behavior if necessary or expedient to do so

student data

Explanation / Answer

Function declare like below

const size_t SCORE_NUM = 5;
const size_t STUDENT_NUM = 100;

size_t inputScores( std::ifstream &, std::string[], double[][SCORE_NUM], size_t );

double computeAverage( const double[], size_t );

char computeLetterGrade( double );

void printGrades( const std::string[], const double[][SCORE_NUM], size_t );

computeAverage as follows below:

double averageCompute( const double scores[], size_t n )
{
   double sum = 0.0;

   for ( size_t i = 0; i < n; i++ ) sum += scores[i];

   return ( n == 0 ? sum : sum / n );
}

it should be called for each row of the array

size_t inputScores( std::ifstream &in,
                    std::string students[],
                    double scores[][SCORE_NUM],
                    size_t n )
{
   std::string record;
   size_t i = 0;

   while ( i < n && std::getline( in, record ) )
   {
      std::istringstream is( record );

      std::string lastName;

      if ( is >> students[i] && is >> lastName )
      {
         students[i] += ' ';
         students[i] += lastName;
      }

      std::memset( scores[i], 0, SCORE_NUM * sizeof( double ) );

      size_t j = 0;

      while ( j < SCORE_NUM && is >> scores[i][j] ) ++j;

      ++i;
   }

   return i;
}

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