Question

This is in C++.

You will write a program that will prompt the user to enter a grade out of 100 and then show them what the equivalent grade points value is. The main() function will handle the input and output tasks, but the actual conversion will occur in a function called GradePoints(). GradePoints Specifications This function is strictly a processing function, meaning that there are no console input or output steps in the actual function. Consider that this function may be re-used in a Windows Forms based program later, so cin and cout might not make sense. This function will have one parameter only. This parameter will be the grade out of 100 that needs to be converted. Note that part of the conversion process includes rounding off the grade to the nearest whole number, and we want this rounding to effect the original variable holding the grade. Consider whether this parameter should be pass-by-value or pass-by-reference. This function will result in one of two outcomes. If the parameter is between 0 and 100, the function will round off the grade to the nearest whole number and return the equivalent GPA value. Use the table below for the equivalencies. Otherwise, if the grade coming in is not between 0 and 100, the function will throw a std::out_of_range exception. Letter A+ A | A- B+ Grade 90-100 85-89 80-84 75-79 70-74 65-69 60-64 55-59 50-54 Below 50 Points 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 GRADE EQUIVALENCY GUIDE 1 Description Notes Outstanding Grades are rounded to the nearest whole number Exemplary before converting to grade points. For example, a Excellent grade of 74.6 is 3.5 grade points, whereas 74.4 is 3.0. Very Good This step is part of the grade points conversion Good process. Satisfactory Acceptable Grades must be between 0 and 100. Conditional Pass Conditional Pass Fail D+ D- F 0.0

Example:

Answer 1

Code

#include<iostream>
#include<iomanip>
using namespace std;
double GradePoints(double *);
int main()
{
   double percentage_grade=0,grade_point;
   cout << fixed << setprecision(1);
   cout << "Enter percentage grades to convert to grade points. Enter '-1' to quit.\n\n";
   while(true)
   {
       cout << "Percentage grade: ";
       cin >> percentage_grade;
       if (percentage_grade == -1)
           break;
       while (cin.fail())
       {
           cout << "* Invalid input. Please try again ad enter a numeric value" << endl;;
           cin.clear();
           cin.ignore(INT_MAX, '\n');
           cin >> percentage_grade;
       }
       try
       {
           grade_point = GradePoints(&percentage_grade);
           cout <<endl <<percentage_grade << "% is " << grade_point << " grade points." << endl;
           cout << endl;
       }
       catch (const char* msg)
       {
           cerr << endl<<msg << endl;
           cout << endl;
       }
   }
   cout << "\nGood bye!" << endl<<endl;
  
   return 1;
}
double GradePoints(double *per)
{
   if (*per < 0 || *per >100)
   {
       throw "An exception occurred: Grade must be between 0.0000 and 100.0000";
   }
   *per = round(*per);
   if (*per >= 90)
       return 5.0;
   else if (*per >= 85 && *per <= 89)
       return 4.5;
   else if (*per >= 80 && *per <= 84)
       return 4.0;
   else if (*per >= 75 && *per <= 79)
       return 3.5;
   else if (*per >= 70 && *per <= 74)
       return 3.0;
   else if (*per >= 65 && *per <= 69)
       return 2.5;
   else if (*per >= 60 && *per <= 64)
       return 2.0;
   else if (*per >= 55 && *per <= 59)
       return 1.5;
   else if (*per >= 50 && *per <= 54)
       return 1.0;
   return 0;
}

output

I D:\Chegg\C++\Student grade point from percentage grade\Debug\Student grade point from percentage grade.exe Enter percentage grades to convert to grade points. Enter '-1' to quit. Percentage grade: chiken * Invalid input. Please try again ad enter a numeric value 85.2 85.0% is 4.5 grade points. Percentage grade: 84.6 85.0% is 4.5 grade points. Percentage grade: 505 An exception occurred: Grade must be between 0.0000 and 100.0000 Percentage grade: -1 Press any key to continue . . .

If you have any query regarding the code please ask me in the comment i am here for help you. Please do not direct thumbs down just ask if you have any query. And if you like my work then please appreciates with up vote. Thank You.