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gpa.cpp
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210 lines (129 loc) · 2.91 KB
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/*
Project: GPA
Author: Jerred Shepherd
Date: 11-5-15
Course: COMP 150
***********
Description
***********
Calculates GPA from any number of courses with a given letter grade and hour value.
GPA is calculated in the following way
Grade * hours, add the result of this from each class and divide by total hours
Grade should be a one of the following letter: A, B, C, D, F
The respectively correspond to the following grades: 4, 3, 2, 1, 0
Number of courses should be a positive integer, hours should be an integer between 1-6.
***************
Sample Dialogue
***************
Number of courses? 3
For course 1:
Grade? A
Hours? 4
For course 2:
Grade? C
Hours? 2
For course 3:
Grade? B
Hours? 3
GPA is 3.22
*/
#include <iostream>
#include <iomanip>
using namespace std;
bool validateGrade(char grade) {
switch (grade) {
case 'A':
case 'a':
case 'B':
case 'b':
case 'C':
case 'c':
case 'D':
case 'd':
case 'F':
case 'f':
return true;
default:
return false;
}
}
bool validateHours(int hours) {
if (hours > 6 || hours < 1) {
return false;
}
return true;
}
bool validateCourses(int courses) {
if (courses < 1) {
return false;
}
return true;
}
int getIntFromLetter(char grade) {
switch (grade) {
case 'A':
case 'a':
return 4;
case 'B':
case 'b':
return 3;
case 'C':
case 'c':
return 2;
case 'D':
case 'd':
return 1;
case 'F':
case 'f':
return 0;
default:
return 0;
}
}
void main() {
int courses, hours;
char grade;
float gpa, totalHours = 0, qualityPoints = 0;
bool validHour = false, validGrade = false, validCourses = false;
cout.precision(2);
cout.setf(ios::fixed);
while (!validCourses) {
cout << "Number of Courses? ";
cin >> courses;
if (validateCourses(courses)) {
validCourses = true;
} else {
cout << "\"" << courses << "\" is not a valid number of courses! Please enter a positive integer" << endl;
}
}
cout << endl;
for (int c = 0; c != courses; c++) {
cout << "For course " << c + 1 << endl;
while (!validGrade) {
cout << "Grade? ";
cin >> grade;
if (validateGrade(grade)) {
validGrade = true;
} else {
cout << "\"" << grade << "\" is not a valid grade! Please enter either A, B, C, D, or F" << endl;
}
}
while (!validHour) {
cout << "Hours? ";
cin >> hours;
if (validateHours(hours)) {
validHour = true;
} else {
cout << "\"" << hours << "\" is not a valid number of hours! Please enter an integer from 1-6" << endl;
}
}
totalHours += hours;
qualityPoints += getIntFromLetter(grade) * hours;
validGrade = false;
validHour = false;
cout << endl;
}
gpa = qualityPoints / totalHours;
cout << "GPA is " << gpa << endl;
system("pause");
}