91 lines
3.9 KiB
C++
91 lines
3.9 KiB
C++
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// fig04_06.cpp
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// Using a switch statement to count letter grades.
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#include <iostream>
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#include <iomanip>
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using namespace std;
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int main() {
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int total{0}; // sum of grades
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int gradeCounter{0}; // number of grades entered
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int aCount{0}; // count of A grades
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int bCount{0}; // count of B grades
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int cCount{0}; // count of C grades
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int dCount{0}; // count of D grades
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int fCount{0}; // count of F grades
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cout << "Enter the integer grades in the range 0-100.\n"
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<< "Type the end-of-file indicator to terminate input:\n"
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<< " On UNIX/Linux/macOS type <Ctrl> d then press Enter\n"
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<< " On Windows type <Ctrl> z then press Enter\n";
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int grade;
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// loop until user enters the end-of-file indicator
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while (cin >> grade) {
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total += grade; // add grade to total
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++gradeCounter; // increment number of grades
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// increment appropriate letter-grade counter
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switch (grade / 10) {
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case 9: // grade was between 90
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case 10: // and 100, inclusive
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++aCount;
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break; // exits switch
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case 8: // grade was between 80 and 89
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++bCount;
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break; // exits switch
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case 7: // grade was between 70 and 79
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++cCount;
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break; // exits switch
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case 6: // grade was between 60 and 69
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++dCount;
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break; // exits switch
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default: // grade was less than 60
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++fCount;
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break; // optional; exits switch anyway
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} // end switch
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} // end while
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// set floating-point number format
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cout << fixed << setprecision(2);
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// display grade report
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cout << "\nGrade Report:\n";
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// if user entered at least one grade...
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if (gradeCounter != 0) {
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// calculate average of all grades entered
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double average{static_cast<double>(total) / gradeCounter};
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// output summary of results
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cout << "Total of the " << gradeCounter << " grades entered is "
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<< total << "\nClass average is " << average
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<< "\nNumber of students who received each grade:"
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<< "\nA: " << aCount << "\nB: " << bCount << "\nC: " << cCount
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<< "\nD: " << dCount << "\nF: " << fCount << "\n";
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}
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else { // no grades were entered, so output appropriate message
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cout << "No grades were entered" << "\n";
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}
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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*************************************************************************/
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