Question

In this lab you are to write a program that calculates a student's final grade and outputs the final letter grade to the console using functions. Two tests scores and one homework score will be supplied by the user. To calculate the final score assume that the tests are each worth 40% and the homework is worth 20% of the total score. You should implement and use the following two functions:

1) calcFinalScore: This function is a value-returning function whose purpose is to compute the final score for a student. It takes three parameters: test1, test2, and hw (all doubles), and returns the final score as a double.

2) printFinalScore: This function is a non value-returning function that outputs a student's final score and letter grade to the console. It takes the parameter finalScore (a double). The breakdown of letter grades is as follows: 90 or above is an A, 80 to 90 is a B, 70 to 80 is a C, 60 to 70 is a D, and less than 60 is a big fat F.

The following is skeleton code you might want to use to start your program.

#include using namespace std; // ***declare the function prototype for "calcFinalScore" here // ***declare the function prototype for "printFinalScore" here int main() { // local variables double test1, test2; // the two tests scores double hw; // the homework score double finalScore; // the student's final score cout > test1; cout > test2; cout > hw; // ***call calcFinalScore here // ***call printFinalScore here system("PAUSE"); return 0; } // ***implement calcFinalScore here // ***implement printFinalScore here The following is a sample run (bracketed bold text denotes user input): Enter the score for test #1: [87.5] Enter the score for test #2: [82] Enter the score for the homework: [95] The student's final score is: 86.8 Their final letter grade is: B

Could definitely use some help on this one

Answer 1

#include <iostream>

using namespace std; 

// ***declare the function prototype for "calcFinalScore" here 
double calcFinalScore(double, double, double);

// ***declare the function prototype for "printFinalScore" here 
void printFinalScore(double);

int main() { 
        // local variables 
        // the two tests scores 
        double test1, test2; 
        
        // the homework score 
        double hw; 
        
        // the student's final score 
        double finalScore;

        // read everything
        cout << "Enter the score for test #1: ";
        cin >> test1; 
        cout << "Enter the score for test #2: ";
        cin >> test2; 
        cout << "Enter the score for homework: ";
        cin >> hw;
        
        // ***call calcFinalScore here 
        finalScore = calcFinalScore(test1, test2, hw);
        
        // ***call printFinalScore here 
        printFinalScore(finalScore);
        
        return 0; 
}

double calcFinalScore(double t1, double t2, double hw) {
        return 0.4 * t1 + 0.4 * t2 + 0.2 * hw;
}

void printFinalScore(double sc) {
        if(sc >= 90) {
                cout << "A" << endl;
        } else if(sc >= 80) {
                cout << "B" << endl;
        } else if(sc >= 70) {
                cout << "C" << endl;
        } else if(sc >= 60) {
                cout << "D" << endl;
        } else {                
                cout << "F" << endl;
        }
}

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