Code Review P4

P4

// #include "stdafx.h"
#include <iostream> // I/O operations
#include <iomanip> // Formatting functions
#include <cstdlib> // General use library functions
#include <string> // Defines dynamic string stuff

using namespace std;

// Prototypes --------------------------------------------------------------------

void splash_scrn(void);
void menu_scrn(string last, string first, string csid, string grade1, string grade2, string grade3, string grade4, string grade5, string grade6);
void input_scrn(string last, string first, string csid, string grade1, string grade2, string grade3, string grade4, string grade5, string grade6);
void output_scrn(string last, string first, string csid, string grade1, string grade2, string grade3, string grade4, string grade5, string grade6);
void transition(void);
void error_scrn(void);

// End of Prototypes -------------------------------------------------------------

int main()
{
	// Variable and object creation ----------------------------------------------

	string csid = "XXXX";
	string first = "XXXX";
	string last = "XXXX";

	string grade1 = "XXXX";
	string grade2 = "XXXX";
	string grade3 = "XXXX";
	string grade4 = "XXXX";
	string grade5 = "XXXX";
	string grade6 = "XXXX";

	char letter_grade = 'A';

	double grade1_num = atof(grade1.c_str());
	double grade2_num = atof(grade2.c_str());
	double grade3_num = atof(grade3.c_str());
	double grade4_num = atof(grade4.c_str());
	double grade5_num = atof(grade5.c_str());
	double grade6_num = atof(grade6.c_str());

	int ctr = 0; // controls loops

	// Transition screen variable

	string resp = "XXXX";
	string ans = "XXXX"; // New for this program

	// End of variable declarations ----------------------------------------------

	// Beginning of the Splash Screen --------------------------------------------

	splash_scrn();

	// End of the Splash Screen --------------------------------------------------

	// Transition to next screen

	transition();
	// End of transition

	// Start of Menu Screen ------------------------------------------------------

	menu_scrn(last, first, csid, grade1, grade2, grade3, grade4, grade5, grade6);
	// menu_scrn()

	// End of Menu screen --------------------------------------------------------

}// End of int main() --------------------------------------------------------

 // Function Definitions ---------------------------------------------------------

void splash_scrn(void)
{
	system("cls");
	cout << R"(
                _______ _______ _______  ______ _______ _______
                |  |  | |       |______ |  ____    |    |______
                |  |  | |_____  ______| |_____|    |    ______|
                                     
                                     _
                                   -=\`\
                               |\ ____\_\__
                              -=\c`""""""" "`)
                              `~~~~~/ /~~`---
                                  -==/ /
                                    '-'
                         _  _
                        ( `   )_
                      (    )    `)                   _  _
                    (_   (_ .  _) _)                ( `   )_
                                        (  )       (  _)   _)
                                     ( `  ) . )
                                    (_, _(  ,_)_)   
 Random College
 STUDENT GRADE TRACKING SYSTEM
 Programmed By: Anon
 Rev 1.0 - 2/16/2020      
)" << endl;
} // End of void splash_scrn(void)

void transition(void)
{
	string resp = "XXX";
	cout << "                                                      Press <ENTER> to Continue";
	getline(cin, resp);
	system("cls");

} // End of void transition(void)

void menu_scrn(string last, string first, string csid, string grade1, string grade2, string grade3, string grade4, string grade5, string grade6)
{

	string ans = "XXXX";
	do

	{
		cout << endl << endl;
		cout << "                                  Random College" << endl;
		cout << "                         STUDENT GRADE TRACKING SYSTEM" << endl;
		cout << "                                ( Main Menu )" << endl;
		cout << endl << endl;




		cout << "                                 <I>nput Student Information";

		cout << "                                 <O>utput Average Grades";

		cout << "                                 <E>xit" << endl;

		cout << endl;

		cout << endl << endl << endl;
		cout << "                                 Enter I, O, or E: ";
		getline(cin, ans);
		system("cls");
		//--------  End of Menu options    ---------------------------

		switch (ans.at(0)) // Beginning of the switch block
		{
		case 'I':
		case 'i':

			// Start of Input Screen -----------------------------------------------------

			cout << endl;
			cout << "                                  Random" << endl;
			cout << "                         STUDENT GRADE TRACKING SYSTEM" << endl;
			cout << "                                ( Input Screen )" << endl;
			cout << endl;
			cout << " ----------------------------------------------------------------------------- " << endl;
			cout << endl;
			cout << "                   Please press <ENTER> after inputting data";
			cout << endl << endl;
			cout << "                   Last Name:  "; getline(cin, last);
			cout << "                   First Name:  "; getline(cin, first);
			cout << endl;
			cout << "                   Student ID Number (10-Digit):  "; getline(cin, csid);
			cout << endl;
			cout << " ----------------------------------------------------------------------------- " << endl;
			cout << endl;
			cout << "                                  Grade 1:  "; getline(cin, grade1);
			cout << "                                  Grade 2:  "; getline(cin, grade2);
			cout << "                                  Grade 3:  "; getline(cin, grade3);
			cout << "                                  Grade 4:  "; getline(cin, grade4);
			cout << "                                  Grade 5:  "; getline(cin, grade5);
			cout << "                                  Grade 6:  "; getline(cin, grade6);
			cout << endl;
			cout << endl;

		    // End of the Input Screen ---------------------------------------------------

		   // Transition to next screen
			transition();
			// End of transition
			break;
		case 'O':
		case 'o':

			// Start of Output Screen ----------------------------------------------------

			output_scrn(last, first, csid, grade1, grade2, grade3, grade4, grade5, grade6);

			// End of the Output Screen --------------------------------------------------

			// Transition to next screen
			transition();
			// End of transition
			break;

		case 'E':
		case 'e':

			break;

		default:
			error_scrn();
			transition();
		} // End of switch(resp.at(0))
	} while (toupper(ans.at(0)) != 'E');
	// End menu processing

}// End of void menu()

void output_scrn(string last, string first, string csidr, string grade1, string grade2, string grade3, string grade4, string grade5, string grade6)
{
	// Calculations

	double Average = (grade1_num + grade2_num + grade3_num + grade4_num + grade5_num + grade6_num) / 6.0;

	{
		if (Average > 100)
			letter_grade = '+';
		else
			if (Average >= 90)
				letter_grade = 'A';
			else
				if (Average >= 80)
					letter_grade = 'B';
				else
					if (Average >= 70)
						letter_grade = 'C';
					else
						if (Average >= 60)
							letter_grade = 'D';
						else
							if (Average >= 50)
								letter_grade = 'E';
							else
								if (Average >= 0)
									letter_grade = 'F';
								else
									letter_grade = '-';
	}

	int ctr = 0;

	cout << endl;
	cout << "                                  Random College" << endl;
	cout << "                         STUDENT GRADE TRACKING SYSTEM" << endl;
	cout << "                                ( Output Screen )" << endl;
	cout << R"(
                                  90 - 100 -> A
                                  80 - 90  -> B
                                  70 - 80  -> C
                                  60 - 70  -> D
                                  50 - 60  -> E
                                  less than 50 -> F
                         ----------------------------------      
)";
	cout << "     Student Name (Last, First):  " << last;
	cout << " " << first << endl;
	cout << "     CSID:  " << csid << endl;
	cout << endl;
	cout << "                                  Grade 1:  " << grade1 << endl;
	cout << "                                  Grade 2:  " << grade2 << endl;
	cout << "                                  Grade 3:  " << grade3 << endl;
	cout << "                                  Grade 4:  " << grade4 << endl;
	cout << "                                  Grade 5:  " << grade5 << endl;
	cout << "                                  Grade 6:  " << grade6 << endl;
	cout << endl;
	cout << "                      Total Grade Average:  " << Average;
	cout << "           Letter Grade:  " << letterGrade << endl;
	if (Average > 100) {
		letterGrade = '+';
		cout << "                   Error: Grade cannot be more than 100";
	}
	if (Average < 0) {
		letterGrade = '-';
		cout << "                   Error: Grade cannot be less than 0";
	}
	cout << endl;
}// End of void output( )

void error_scrn(void)
{

	cout << endl;
	cout << "                                  Random College" << endl;
	cout << "                         STUDENT GRADE TRACKING SYSTEM" << endl;
	cout << "                                ( Error Screen )" << endl;
	cout << endl << endl;
	cout << "----------------------------------------------------------------------------";
	cout << endl;
	cout << "                   Error: Enter I, O, or E!" << endl;
}// End of void error_scrn(void)