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/*
* Official NFL QB rating
*
* Copyright © 1999 Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*
* Info from various web sources
* 3 ways of computing the result: first uses no
* decimal approximations, last only decimal approximations.
*/
rational qbrating (int attempts, int completions, int yards,
int touchdowns, int interceptions)
{
int v1, v2, v3, v4;
v1 = 500 * completions;
v2 = 25 * yards;
v3 = 2000 * touchdowns;
v4 = -2500 * interceptions;
return (v1 + v2 + v3 + v4) / (6 * attempts) + 25 / 12;
}
real qbr2 (int attempts, int completions, int yards,
int touchdowns, int interceptions)
{
real v1, v2, v3, v4;
v1 = (completions / attempts - 0.3) / 0.2;
v2 = (yards / attempts - 3) / 4;
v3 = (touchdowns / attempts) / 0.05;
v4 = (0.095 - interceptions / attempts) / 0.04;
return (v1 + v2 + v3 + v4) * 100 / 6;
}
real qbr3 (int attempts, int completions, int yards,
int touchdowns, int interceptions)
{
real v1, v2, v3, v4;
v1 = 83.333 * completions;
v2 = 4.167 * yards;
v3 = 333.333 * touchdowns;
v4 = -416.667 * interceptions;
return (v1 + v2 + v3 + v4) / attempts + 2.083;
}
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