Compilare: warning: value assigned to `ok` is never read --> main.rs:27:17 | 27 | let mut ok:i8 = 0; | ^^ | = help: maybe it is overwritten before being read? = note: `#[warn(unused_assignments)]` on by default warning: method `get_sum_col` is never used --> main.rs:13:8 | 9 | impl InputData { | -------------- method in this implementation ... 13 | fn get_sum_col(&self, col:usize) -> i32{ | ^^^^^^^^^^^ | = note: `#[warn(dead_code)]` on by default warning: 2 warnings emitted