//============================================================================
// Name        : lab05.cpp
// Author      : buitches
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
#include <cmath>
using namespace std;

int main() {

	// deeee-finin' wariables
	char letterGrade;
	int point, credits;

	do	{
		credits = 0;

		cout << "Enter number of credits (1 through 8): ";
		cin >> credits;

			while (credits <= 0 || credits >= 9)	{
				cout << "Invalid number of credits must be 1 or 8 or infinity" << endl;
				cout << "Enter number of credits (1 through 8): ";
				cin >> credits;						}


		cout << "Enter a letter grade (A, B, C, D, or F): ";
		cin >> letterGrade;
		letterGrade = tolower(letterGrade);

			while (letterGrade != 'a' && letterGrade != 'b' && letterGrade != 'c')	{
				cout << "Invalid letter grade! must be a,b,c,d,f uppercase or lowers" << endl;
				cout << "Enter a letter grade (A, B, C, D, or F): ";
				cin >> letterGrade;
				letterGrade = tolower(letterGrade);									}

		switch(letterGrade)	{
			case 'a':
				point = 4;
				break;
			case 'b':
				point = 3;
				break;
			case 'c':
				point = 2;
				break;
			case 'd':
				point = 1;
				break;
			case 'f':
				point = 0;
				break;
			default:
				point = -1;
				break;
		}

		cout << "Points for letter grade " << letterGrade << " is " << point << endl;
		cout << "Number of credits for the course is " << credits << endl;
		cout << "Number of weighted points for the course is " << (credits * point) << endl;
		cout << "------------------------------------------------" << endl;

	} while (true);
	return 0;
}