Function avg 

pub fn avg(lines: usize, files: usize) -> usize

Compute the average of lines over files, rounding to nearest integer.

Returns 0 if files is zero.

Examples

use tokmd_model::avg;

assert_eq!(avg(300, 3), 100);
assert_eq!(avg(0, 5), 0);
assert_eq!(avg(100, 0), 0);
// Rounds to nearest: 7 / 2 = 3.5 → 4
assert_eq!(avg(7, 2), 4);