public/subjects/scalar/README.md

## Scalar

### Instructions

Create the following **functions**, which each accept two parameters:

- `sum`, which returns the sum between two values from 0 to 255
- `diff`, which returns the difference between two values from -32768 to 32767
- `pro`, which returns the product of the multiplication between two values from -128 to 127
- `quo`, which returns the quotient of the division between two 32bit values
- `rem`, which returns the remainder of the division between two 32bit values

> You will need to figure out the exact data types for the parameters **and** the return values.
  There are some hints in the example.


```rust
pub fn sum(a: X, b: X) -> X {

}

pub fn diff(a: X, b: X) -> X {

}

pub fn pro(a: X, b: X) -> X {

}

pub fn quo(a: X, b: X) -> X {

}

pub fn rem(a: X, b: X) -> X {

}
```

### Example

```rust
use scalar::*;

fn main() {
    // sum
    println!("sum : {}", sum(234, 2)); // 'sum : 236'
    println!("sum : {}", sum(1, 255)); // 'ERROR: attempt to add with overflow'
    // diff
    println!("diff : {}", diff(234, 2)); // 'diff : 232'
    println!("diff : {}", diff(-32768, 32766)); // 'ERROR: attempt to subtract with overflow'
    // product
    println!("pro : {}", pro(23, 2)); // 'pro : 46'
    println!("pro : {}", pro(-128, 2)); // 'ERROR: attempt to multiply with overflow'
    // quotient
    println!("quo : {}", quo(22.0, 2.0));// 'quo : 11'
    println!("quo : {}", quo(-128.23, 2.0));// 'quo : -64.115'
    // remainder
    println!("rem : {}", rem(22.0, 2.0));// 'rem : 0'
    println!("rem : {}", rem(-128.23, 2.0));// 'rem : -0.22999573'
}
```

### Notions

- [Data Types](https://doc.rust-lang.org/book/ch03-02-data-types.html)