/*course: CS215 - 001
*Project: Lab 6 (As part of Project 1)
*Purpose: Display the year of Super Bowl in Roman Numeral Representation
* The first Super Bowl was hold in 1967 (at Los Angeles Memorial Coliseum)
* For testing purpose, this program displays the Super Bowls in two-group of 50 years
* (1) from year 2000 to year 2049;
* (2) from year 5916 to year 5965.
*Author: Christian Brewer
*/
#include <iostream>
#include <string>
using namespace std;
//Turns a digit into a Roman numeral
string roman_digit(int digit, string one, string five, string ten);
//Returns a string form of a Roman Numeral.
//(n must be between 1 and 3999)
string roman_numeral(int n);
int main()
{
const int START_SUPERBOWL = 1967; // The first Super Bowl was hold in 1967 (at Los Angeles Memorial Coliseum)
const int FIRST_START = 2000; // The first group displays Super Bowl starting in year 2000
const int FIRST_END = 2049; // The first group displays Super Bowl ending in year 2099
const int SECOND_START = 5916; // The second group displays Super Bowl starting in year 5616
const int SECOND_END = 5965; // The second group displays Super Bowl ending in year 5965
// define the correct range for Roman Numerals: [MIN_ROMAN, MAX_ROMAN]
const int MIN_ROMAN = 1;
const int MAX_ROMAN = 3999;
// The last Super Bowl which can be represented by Roman Numerals would be: START_SUPERBOWL + MAX_ROMAN - 1;
const int GROUP = 10; // Layout the years in a group of 10
while(true){
//creating varibles maintaining the loop
bool repeat = true;
bool success_input = true;
int year;
//print out the Super Bowl information
cout << "***********************************************************" << endl;
cout << "* The Super Bowl is the annual final playoff game *" << endl;
cout << "* of the NFL to determine the league champion. *" << endl;
cout << "* The first Super Bowl took place on January 15, 1967. *" << endl;
cout << "* Super Bowl I (Los Angeles Memorial Coliseum) --> 1967 *" << endl;
cout << "* This Roman Numerals Convertor is written by Yi Pike. *" << endl;
cout << "* If you had a time machine, which year of Super Bowl *" << endl;
cout << "* would you want to attend (1967 - 5965) ? *" << endl;
cout << "***********************************************************" << endl;
cout << "Please enter the year you want to attend (click Q or q to quit):" << endl;
//allow user input a year
cin >> year;
//execute if the cin fail
if (cin.fail())
{
// clean and reset cin
cin.clear();
string input_to_check;
cin >> input_to_check;
cin.ignore(256,'\n');
//run if user input q or Q
if (input_to_check == "q" || input_to_check == "Q")
{
cout << "Back to 2024, and have a great day!" << endl;
repeat = false;
}
else
{
cout << "Please use four-digit number to represent a year (1967-5965)!"<< endl;
success_input = false;
}
}
//execute if the cin did not fail
else
{
//clear the left over from cin
cin.ignore(256,'\n');
}
// if repeat is set to false, then break out of the loop
if (repeat == false)
{
break;
}
//Run if the cin did not fail
if(success_input){
cout << "The time machine will bring you to the year of " << year <<":" << endl;
//Run if year is smaller than the START_SUPERBOWL
if ( year < START_SUPERBOWL){
cout << "Wait!!! The year you enter is TOO EARLIER than the first Super Bowl!" << endl;
}
//Run if year is bigger than the largest year value able to be represent by roman numbers
else if (year > SECOND_END){
cout << "Hold on!!! The year you enter is TOO BIG for Roman Numerals!" << endl;
}
//Run if the year is valid within the range
else{
int roman_year = year - START_SUPERBOWL + 1;
cout << "It is Super Bowl " << roman_numeral(roman_year) << endl;
cout << "We will help you find out the result and other interesting information...next time:)" << endl;
}
}
//give it a line space before next loop runs
cout << endl;
}
}
/*
Purpose: convert the integer n to its corresponding Roman Numeral
n must be between 1 and 3999
it returns string form of the Roman Numeral
@param n int: representing the number to convert into Roman Numeral
@return string: representing the corresponding Roman Numeral for n
*/
string roman_numeral(int n){
//Abstract each digit
int first_digit = n % 10;
int second_digit = n / 10 % 10;
int third_digit = n / 100 % 10;
int fourth_digit = n / 1000 % 10;
//pass call roman_digit to get the corresponding roman number for each digit
string unitRoman = roman_digit(first_digit, "I", "V", "X");
string tenthRoman = roman_digit(second_digit, "X", "L", "C");
string hundredRoman = roman_digit(third_digit, "C", "D", "M");
string thousandthRoman;
for (int i = 0; i < fourth_digit; i++){
thousandthRoman += "M";
}
//concatenate the string together
string roman = thousandthRoman+hundredRoman + tenthRoman + unitRoman;
// return the roman number
return roman;
}
/*
Turns a digit into a Roman numeral.
@param digit: the digit to convert into Roman
@param one: string representing the Roman numeral for ones
@param five: string representing the Roman numeral for fives
@param ten: string representing the Roman numeral for tens
@return string representing the Roman number for digit
*/
string roman_digit(int digit, string one, string five, string ten){
string roman_num;
//arrange the digit in pattern according to the value of the digit
switch (digit){
case 1:
roman_num = one;
break;
case 2:
roman_num = one + one;
break;
case 3:
roman_num = one + one + one;
break;
case 4:
roman_num = one + five;
break;
case 5:
roman_num = five;
break;
case 6:
roman_num = five + one;
break;
case 7:
roman_num = five + one + one;
break;
case 8:
roman_num = five + one + one + one;
break;
case 9:
roman_num = one + ten;
break;
default:
break;
}
//return the roman number
return roman_num;
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