Pure Programmer
Project: 99 Bottles of Beer Lyrics
Compute the full lyrics to the song 99 Bottles of Beer. Write a function to print a verse given the verse number. Be sure to handle the special cases when there are just one bottle of beer and no bottles of beer.
See [[99 Bottles of Beer]]
Output
$ rustc BottlesOfBeerLyrics.rs
warning: unnecessary parentheses around assigned value
--> BottlesOfBeerLyrics.rs:16:24
|
16 | numMinusOneBottles += (if num == 2 { " bottle" } else { " bottles" });
| ^ ^
|
= note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
|
16 - numMinusOneBottles += (if num == 2 { " bottle" } else { " bottles" });
16 + numMinusOneBottles += if num == 2 { " bottle" } else { " bottles" };
|
error[E0368]: binary assignment operation `+=` cannot be applied to type `&str`
--> BottlesOfBeerLyrics.rs:11:3
|
11 | numBottles += "s";
| ----------^^^^^^^
| |
| cannot use `+=` on type `&str`
error[E0277]: cannot subtract `String` from `isize`
--> BottlesOfBeerLyrics.rs:15:55
|
15 | numMinusOneBottles = if num == 1 { "No" } else { num - 1.to_string() };
| ^ no implementation for `isize - String`
|
= help: the trait `Sub<String>` is not implemented for `isize`
= help: the following other types implement trait `Sub<Rhs>`:
<&'a isize as Sub<isize>>
<&isize as Sub<&isize>>
<isize as Sub<&isize>>
<isize as Sub>
error[E0368]: binary assignment operation `+=` cannot be applied to type `&str`
--> BottlesOfBeerLyrics.rs:16:2
|
16 | numMinusOneBottles += (if num == 2 { " bottle" } else { " bottles" });
| ------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| cannot use `+=` on type `&str`
error: aborting due to 3 previous errors; 1 warning emitted
Some errors have detailed explanations: E0277, E0368.
For more information about an error, try `rustc --explain E0277`.