use axum::{Router, routing::get, Json};
use serde::Serialize;
use std::net::SocketAddr;
use tokio::net::TcpListener;
#[derive(Serialize)]
struct Variables {
    user_name: String,
    age: i32,
    is_student: bool,
    score: f32,
}
async fn display_variables() -> Json<Variables> {
    // Declare and assign variables of different types
    let user_name = String::from("Alice");
    let age = 25;
    let is_student = true;
    let score = 95.5;
    // Return variables as JSON
    Json(Variables {
        user_name,
        age,
        is_student,
        score,
    })
}
#[tokio::main]
async fn main() {
    // Create Axum router with a single route
    let router = Router::new().route("/variables", get(display_variables));
    // Set up server address and port
    let addr = SocketAddr::from(([0, 0, 0, 0], 8080));
    let tcp = TcpListener::bind(&addr).await.unwrap();
    println!("Ready and listening on {}", addr);
    // Start the server
    axum::serve(tcp, router).await.unwrap();
}