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// --------------------------------------------------------------
// Read a file of scores 0..100
// Count number of scores in following ranges
// 90 - 100 "A", and so on for B, C, D, F
// Store the scores so that they can be sorted later on
// *Assume exactly 10 scores
// --------------------------------------------------------------
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <cassert>
using namespace std;
// =========================
// Global Declarations
// =========================
const char INVALID_GRADE = 'z';
const int NUM_SCORES = 10;
char letterGrade(double s);
// Given a score in range 0..100, returns (uppercase) letter grade
// Returns INVALID_GRADE if score input is outside 0..100 range
void printScores(const double s[], int len);
// =========================
// Main Function
// =========================
int main()
{
ifstream infile;
string filename;
double scores[NUM_SCORES]; // declares 10 scores
// Prompt user for the file name
cout << "Enter input file name containing scores: ";
getline(cin, filename);
infile.open(filename.c_str());
// Validate that the input file opened successfully
assert(infile);
char lgrade;
int Acount = 0, Bcount = 0, Ccount = 0, Dcount = 0, Fcount = 0, invalidcount = 0;
for ( int i = 0; i < NUM_SCORES; ++i)
{
infile >> scores[i];
lgrade = letterGrade(scores[i]);
switch (lgrade)
{
case 'A':
Acount++; break;
case 'B':
Bcount++; break;
case 'C':
Ccount++; break;
case 'D':
Dcount++; break;
case 'F':
Fcount++; break;
case INVALID_GRADE:
invalidcount++; break;
}
cout << scores[i] << " => " << lgrade << endl;
}
// Display counter statistics
cout << endl;
cout << "Summary Report" << endl;
cout << " " << Acount << " A's" << endl;
cout << " " << Bcount << " B's" << endl;
cout << " " << Ccount << " C's" << endl;
cout << " " << Dcount << " D's" << endl;
cout << " " << Fcount << " F's" << endl;
cout << " " << invalidcount << " invalid scores" << endl;
infile.close();
// TODO: Write a function printArray that prints the entire array
// of scores. Pass the array in as a parameter.
cout << "Enter input file name containing scores: ";
getline(cin, filename);
infile.open(filename.c_str());
// Validate that the input file opened successfully
assert(infile);
printScores(scores, NUM_SCORES);
return 0;
}
// =========================
// Function Definitions
// =========================
char letterGrade(double s)
{
if (s > 100.0 || s < 0.0)
return INVALID_GRADE;
else if (s >= 90.0)
return 'A';
else if (s >= 80.0)
return 'B';
else if (s >= 70.0)
return 'C';
else if (s >= 60.0)
return 'D';
else
return 'F';
}
void printScores(const double s[], int len)
{
//What code goes here in the function???
}
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