here is the input Johnson 85 83 77 91 76 Aniston 80 90 95 93 48 Cooper 78 81 11

Question

here is the input Johnson 85 83 77 91 76
Aniston 80 90 95 93 48
Cooper 78 81 11 90 73
Gupta 92 83 30 69 87
Blair 23 45 96 38 59
Clark 60 85 45 39 67
Kennedy 77 31 52 74 83
Bronson 93 94 89 77 97
Sunny 79 85 28 93 82
Smith 85 72 49 75 63

the quetion.

Write a program to calculate students' average test scores and their grades. Use three arrays: one-dimensional array to store the test scores, and a parallel one- dimensional array to store grade. Your program must contain at least the following functions: a function to read and store data into two arrays, a function to calculate the average test score and grade, and a function to output the results. Have your program also output the class average.

Please help with this Program. Here is what the output should look like. here is the input Johnson 85 83 77 91 76 Aniston 80 90 95 93 48 Cooper 78 81 11 90 73 Gupta 92 83 30 69 87 Blair 23 45 96 38 59 Clark 60 85 45 39 67 Kennedy 77 31 52 74 83 Bronson 93 94 89 77 97 Sunny 79 85 28 93 82 Smith 85 72 49 75 63 the quetion. Write a program to calculate students' average test scores and their grades. Use three arrays: one-dimensional array to store the test scores, and a parallel one- dimensional array to store grade. Your program must contain at least the following functions: a function to read and store data into two arrays, a function to calculate the average test score and grade, and a function to output the results. Have your program also output the class average.

Explanation / Answer

//Header files #include<iostream> #include<fstream> #include<iomanip> #include<string> #include<math.h> //namespace statement. using namespace std; const int numTests = 5; const int numStudents = 10; // Theses are function prototypes void getData(ifstream &inFile, string names[numStudents], double tests[numStudents][numTests + 1]); //#1 double calculateAverage(double tests[]); //#2 char getLetterGrade(double grade); void printTests(ofstream &outFile, string names[numStudents], double tests[numStudents][numTests + 1], char grade[numStudents], double classAverage); //#3 int main() { // Declaring stream files ifstream inFile; inFile.open ("ch9_Ex13Data.txt"); // opens the input file ofstream outFile; outFile.open ("Ch9_Ex13Out.txt"); // Opens the output file string names[numStudents]; double tests[numStudents][numTests + 1]; char grade[numStudents]; //declaring arrays if(!inFile.is_open()) { //Terminates the program cout << "Error in opening file."; cout << "Program terminates." << endl; return 1; } // Display an error if the input file does not open. getData(inFile, names, tests); //gets data into arrays // Declaring Variables double runningAverage = 0.0, classAverage = 0.0; for(int i = 0; i < numStudents; i++) { tests[i][numTests] = calculateAverage(tests[i]); //storing the average in the last element of the tests array grade[i] = getLetterGrade(tests[i][numTests]); //gets letter grade runningAverage += tests[i][numTests]; //adds up all the averages from students } classAverage = runningAverage / numStudents; //calcs class average printTests(outFile, names, tests, grade, classAverage); //prints results system("pause"); return 0; } //reads in student test tests and name void getData(ifstream &inFile, string names[numStudents], double tests[numStudents][numTests + 1]) { for(int i = 0; i < numStudents; i++) { inFile >> names[i]; //gets name for(int j = 0; j < numTests ; j++) { inFile >> tests[i][j]; //gets test tests } } inFile.close (); //closing data file } // average the test tests for the student double calculateAverage(double tests[numTests]) { double total = 0; double average = 0.0; for(int i = 0; i < numTests; i++) { total += tests[i]; //gets test tests and adds to running total } average = total / numTests; //calcs the average return average; //returns the average } // determines and returns the students letter grade char getLetterGrade(double grade) { if (grade < 60) return 'F'; else if (grade < 70) return 'D'; else if (grade < 80) return 'C'; else if (grade < 90) return 'B'; else return 'A'; } void printTests(ofstream &outFile, string names[numStudents], double tests[numStudents][numTests + 1], char grade[numStudents], double classAverage) { //align the names to the left cout.setf(ios::left); cout << fixed << showpoint << setprecision (2); cout << setw(10) << "Name" << setw(9); cout.unsetf(ios::left); //align the test headings to the right cout.setf(ios::right); cout << "Test 1" << setw(8) << "Test 2" << setw(8) << "Test 3" << setw(8) <<"Test 4" << setw(8) << "Test 5" << setw(11) << "Average" << setw(8) << "Grade" << endl; //align the names to the left outFile.setf(ios::left); outFile << fixed << showpoint << setprecision (2); outFile << setw(10) << "Name" << setw(9); //align the test headings to the right outFile.setf(ios::right); outFile << "Test 1" << setw(8) << "Test 2" << setw(8) << "Test 3" << setw(8) <<"Test 4" << setw(8) << "Test 5" << setw(11) << "Average" << setw(8) << "Grade" << endl; // Read and write a students name from the input file for(int i = 0; i < numStudents; i++) { cout.unsetf(ios::right); cout.setf(ios::left); //align the names to the left cout << setw(10) << names[i] << setw(9); cout.unsetf(ios::left); cout.setf(ios::right); //align the tests to the right cout << fixed << showpoint << setprecision (2); outFile.unsetf(ios::right); outFile.setf(ios::left); //align the names to the left outFile << setw(10) << names[i] << setw(9); outFile.unsetf(ios::left); outFile.setf(ios::right); //align the tests to the right outFile << fixed << showpoint << setprecision (2);    for(int j = 0; j < numTests + 1; j++) { if(j == numTests) //if it's time to print the average of the tests, needs special formatting { cout << setw(11) << tests[i][j]; cout << setw(6) << grade[i] << endl; outFile << setw(11) << tests[i][j]; outFile << setw(6) << grade[i] << endl; } else //otherwise just print the test score { cout << tests[i][j] << setw(8); outFile << tests[i][j] << setw(8); } } } cout << " Class average: " << classAverage << endl << endl;; outFile << " Class average: " << classAverage << endl << endl; //class average outFile.close (); //closing output file }

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