Question

C++

Use C++ functions and build a program that does the most basic job all students have to contend with, process the grades on a test and produce a summary of the results. The big wrinkle is, it should be a multi-file program.

-Requires three simple things:

• Figure out the best score of all scores produced
• Figure out the worst score of all scores produced
• Assign a letter grade for each score produced
• Complete this lab by writing three functions.
• Here is our list of grades to process:

• int grades[15] = { 55, 87, 93, 77, 92, 88, 67, 81, 84, 73, 81, 92, 89, 100, 62 };

• Call each function with the grades array as a parameter, and the number of         values in that array in your main routine and make it do the following work:

• Use the max value function to print out the max value found in the grade array.
• Use the min value function to print out the min value found in the grade array
• Use the letter grade function to print out the grade number and the associated letter grade for each score in the array. This will require a nested if-then-else statement to figure this out.

Answer 1

Below is your code: -

gradeHelper.cpp

#include<iostream>
using namespace std;

int maxValue(int grades[], int size) {
   int max = 0;
   for(int i = 0;i < size; i++) {
       if(max < grades[i]) {
           max = grades[i];
       }
   }
   return max;
}

int minValue(int grades[], int size) {
   int min = grades[0];
   for(int i = 0;i < size; i++) {
       if(min > grades[i]) {
           min = grades[i];
       }
   }
   return min;
}

char getLetterGrade(int grade_num) {
   char letter;
   if (grade_num<=60) {
   letter = 'F';
}
else if ( grade_num<=69) {
letter = 'D';
}
else if (grade_num<=79) {
letter = 'C';
}
else if (grade_num<=89) {
letter = 'B';
}
else if(grade_num<=100) {
   letter = 'A';  
   }
return letter;
}

gradeTester.cpp

#include<iostream>
#include "gradeHelper.cpp"

int main() {
   int grades[15] = { 55, 87, 93, 77, 92, 88, 67, 81, 84, 73, 81, 92, 89, 100, 62 };
  
   int max = maxValue(grades,15);
   int min = minValue(grades,15);
  
   cout<<"Grades entered: ";
   for(int i = 0; i< 15; i++) {
       cout<<grades[i]<<" ";
   }
  
   cout<<"\n\nMaximum Score: "<<max<<endl;
   cout<<"Minimum Score: "<<min<<endl;
  
   cout<<"\nGrades Summary: "<<endl;
   cout<<"\nScore\t\tGrade"<<endl;
   for(int i = 0; i< 15; i++) {
       cout<<grades[i]<<"\t\t"<<getLetterGrade(grades[i])<<endl;
   }
}

Output

Grades entered: 55 87 93 77 92 88 67 81 84 73 81 92 89 100 62

Maximum Score: 100
Minimum Score: 55

Grades Summary:

Score Grade
55 F
87 B
93 A
77 C
92 A
88 B
67 D
81 B
84 B
73 C
81 B
92 A
89 B
100 A
62 D