/* Name: Ryan Bertran
Date: Feb 18, 2022
Assignment: Calculating NFL Passer Rating
Due Date: Feb 21, 2022
About this project: In this project we are calculating the NFLs passer rating using the real formulas.
Assumptions: Assume correct user input for all Int variables
All work below was performed by Ryan Bertran */
#include <iostream>
#include <iomanip>
using namespace std;
double getPasserRating(double Att, double Comp, double Pass, double TD, double Inter);
// this is the function decleration that will calculate the passer rating
int main()
{
int AttemptsA, CompletionsA, PassingYardsA, TouchdownsA, InterceptionsA;
int AttemptsB, CompletionsB, PassingYardsB, TouchdownsB, InterceptionsB;
int comparisons = 0;
double PlayerARating, PlayerBRating, difference;
char another;
/*These variable are all necessary to carry out my program, it is important that comparison is = 0
so that the compilor does not assume a random value.*/
bool running = true;
// running will equal true until user input says other wise
cout << fixed << showpoint << setprecision(1);
cout << "Welcome to the NFL Quarterback Passer Rating Calculator!" << endl;
while(running) // this loop will continue until running is input as false
{
cout << "\nEnter single game informatiion for Player A:\n";
cout << "Attempts: ";
cin >> AttemptsA;
cout << "Completions: ";
cin >> CompletionsA;
cout << "Passing Yards: ";
cin >> PassingYardsA;
cout << "Touchdowns: ";
cin >> TouchdownsA;
cout << "Interceptions: ";
cin >> InterceptionsA;
cout << "\nEnter single game informatiion for Player B:\n";
cout << "Attempts: ";
cin >> AttemptsB;
cout << "Completions: ";
cin >> CompletionsB;
cout << "Passing Yards: ";
cin >> PassingYardsB;
cout << "Touchdowns: ";
cin >> TouchdownsB;
cout << "Interceptions: ";
cin >> InterceptionsB;
PlayerARating = getPasserRating(AttemptsA, CompletionsA, PassingYardsA, TouchdownsA, InterceptionsA);
PlayerBRating = getPasserRating(AttemptsB, CompletionsB, PassingYardsB, TouchdownsB, InterceptionsB);
// so long the variable are in correct order, the function will run properly
cout << "\nPlayer A's single game passer rating: " << PlayerARating;
cout << "\nPlayer B's single game passer rating: " << PlayerBRating << endl;
if(PlayerARating > PlayerBRating)
{
difference = PlayerARating - PlayerBRating;
cout << "Player A was better than Player B by a difference of " << difference << endl;
}
else if(PlayerARating == PlayerBRating)
cout << "Player A and B have the same rating" << endl;
else
{
difference = PlayerBRating - PlayerARating;
cout << "Player B was better than Player A by a difference of " << difference << endl;
}
// this part of the program compares player a and b's passerating
if(PlayerARating >= 158.33)
cout << "\nPlayer A had a PERFECT passer rating.\n";
if(PlayerBRating >= 158.33)
cout << "\nPlayer B had a PERFECT passer rating.\n";
// this tells whether or not either player had a perfect passer rating
cout << "\nWould you like to compare another pair of players? (Y or N)";
cin >> another;
if(another == 'N' || another == 'n')
running = false;
if(another == 'Y' || another == 'y')
running = true;
if(another != 'N' && another != 'n' && another != 'Y' && another != 'y')
{
cout << "Invalid entry. Exiting program...";
running = false;
}
//this part of the program tells the compiler whether or not the while loop will run again
comparisons ++;
// every time the loop runs there comparisons will be added by 1
}
if (comparisons <= 1 && (another == 'N' || another == 'n' || another == 'Y' || another == 'y'))
cout << "You compared " << comparisons << " pair of players.";
else if(comparisons > 1 && (another == 'N' || another == 'n' || another == 'Y' || another == 'y'))
cout << "You compared " << comparisons << " pairs of players.";
// i needed to make sure that this output only showed if the 'another' entry was valid
return 0;
}
double getPasserRating(double Att, double Comp, double Pass, double TD, double Inter)
{
double a, b, c, d, rating;
a = ((Comp/Att)-.3)*5;
if(a > 2.375)
a = 2.375;
else if(a < 0)
a = 0;
b = ((Pass/Att)- 3)*.25;
if(b > 2.375)
b = 2.375;
else if(b < 0)
b = 0;
c = ((TD/Att)*20);
if(c > 2.375)
c = 2.375;
else if(c < 0)
c = 0;
d = 2.375 -((Inter/Att)*25);
if(d > 2.375)
d = 2.375;
else if(d < 0)
d = 0;
//the perameters and calculations are set above
if(Att == 0)
rating = 0; //the denominator 'Att' cannot be zero or ratting = 0
else
rating = ((a+b+c+d)/6)*100;
//the final calculation to find the passer rating
return rating;
}
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