tuple&Struct.rs

fn main(){

    // Tuple of length 3 and type (char,i32,bool)
    let tuple_e = ('E', 5i32, true);
    //after declaration you can't add or remove element from tuple and the size is fixed

    // Use tuple indexing and show the values of the elements in the tuple
    println!("Is '{}' the {}th letter of the alphabet? {}", tuple_e.0, tuple_e.1, tuple_e.2);

    // Classic struct with named fields(name of field : type of field)
    struct Student { name: String, level: u8, remote: bool }

    // Tuple struct with data types only
    struct Grades(char, char, char, char, f32);

    // Unit struct
    struct Unit;

    // Instantiate classic struct, specify fields in random order, or in specified order
    let user_1 = Student { name: String::from("Constance Sharma"), remote: true, level: 2 };
    let user_2 = Student { name: String::from("Dyson Tan"), level: 5, remote: false };

    // Instantiate tuple structs, pass values in same order as types defined
    let mark_1 = Grades('A', 'A', 'B', 'A', 3.75);
    let mark_2 = Grades('B', 'A', 'A', 'C', 3.25);

    println!("{}, level {}. Remote: {}. Grades: {}, {}, {}, {}. Average: {}", 
            user_1.name, user_1.level, user_1.remote, mark_1.0, mark_1.1, mark_1.2, mark_1.3, mark_1.4);
    println!("{}, level {}. Remote: {}. Grades: {}, {}, {}, {}. Average: {}", 
            user_2.name, user_2.level, user_2.remote, mark_2.0, mark_2.1, mark_2.2, mark_2.3, mark_2.4);
}