Ejemplo operaciones matematicas Rust

 1 //Ejercicio operaciones matematicas Rust
 2 #[warn(unused_variables)]
 3
 4 fn operacion(oper:&str ,a:i64,b:i64)->i64{
 5         match oper{
 6                 "+" => {a+b},
 7                 "-"=>  { a-b },
 8                 "*" | "x" =>{ a*b},
 9                 "/"=>{a/b},
10                 "%"=>{ a%b },
11                 "^"=>{a.pow(b.try_into().unwrap())},
12                 &_ => todo!()
13         }
14 }
15
16 fn main (){
17         let a:i64=4;
18         let b:i64=2;
19         let operaciones=["+","-","*","/","%","^"];
20
21         for operador in operaciones{
22                 println! ("{} {} {} =  {} ",a,operador,b,operacion(operador,a,b));
23         }
24 }
25