The Tragic death, of str :(

agenda.rs

extern crate serialize;
use std::io;

fn main() {
    use serialize::{Decodable, Encodable, json};
    use serialize::json::PrettyEncoder;
    println!("*******/// Agenda \\\\\\*******(v.0.0.1)");
    println!("Developed by Karim Ellaisy, Written in Rust\n\n");
    println!("Enter Class name first, then enter stuff for it.");
    let mut stdin = io::stdin();
    let (mut class1,mut class2,mut class3,mut class4,mut class5,mut class6,mut class7,mut class8) = (" ".to_string(), " ".to_string()," ".to_string()," ".to_string()," ".to_string()," ".to_string()," ".to_string()," ".to_string());
    let mut reader = stdin.lock();
    for line in reader.lines() {
        let srt = line.unwrap();
        let v: Vec<_> = srt.splitn(1,' ').collect();
        match v[0].trim() {
           "Java" => {
                class1 = v[1].to_string();
                }
          /* "Latin"|"latin" => {
                class2 = srt.as_slice().trim().nth();
                }
            "Math"|"math" => { 
               class3 = srt.as_slice().trim().nth();
                }
            "english"|"English" => {
                class4 = srt.as_slice().trim().nth();
                }
            "PRM"|"prm" => {
                class5 = srt.as_slice().trim().nth();
                }
            "history" => {
                class6 = srt.as_slice().trim().nth();
                }
            "Health"|"health" => {
                class7 = srt.as_slice().trim().nth();
                }
            "Chemistry"|"chemistry"|"chem" => {
               class8 = srt.as_slice().trim().nth();
                } */
            "done" => println!("sup"), 
            _ => println!("Input Invalid! from the outer braces"),
        }
#[deriving(Encodable)]
struct Agenda {
    AP_Java: String,
    Latin_III: String,
    Algebra_II: String,
    Honors_English: String,
    PRM: String,
    Honors_History: String,
    Health: String,
    Chemistry: String,
}
let mut user = Agenda {
    AP_Java: class1,
    Latin_III: class2,
    Algebra_II: class3,
    Honors_English: class4,
    PRM: class5,
    Honors_History: class6,
    Health: class7,
    Chemistry: class8,
};

let mut buffer: Vec<u8> = Vec::new();
{
    let mut encoder = PrettyEncoder::new(&mut buffer);
    user.encode(&mut encoder).ok().expect("JSON encode error");
}
let encoded = String::from_utf8(buffer).unwrap();
println!("{}", encoded);
}
}

gistfile1.txt

So Im tryin to create practical apps in Rust to learn it, so I'm creating an Agenda(which ill add GUI later), this is what I have so far:

gistfile2.txt

What am I tryinf to do right now? Im trying to add the input options to add the stuff u have to do with each class. so If I input
`Java, Do wkst 1 and 2` the match case will match Java, then take the rest and mutate class1 with whats after `Java` and so on with other classes.

Whats the problem though?

This is the error Im getting:

gistfile3.rs

$ rustc test.rs
test.rs:56:14: 56:20 error: use of moved value: `class1`
test.rs:56     AP_Java: class1,
                        ^~~~~~
test.rs:56:14: 56:20 note: `class1` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:56     AP_Java: class1,
                        ^~~~~~
test.rs:57:16: 57:22 error: use of moved value: `class2`
test.rs:57     Latin_III: class2,
                          ^~~~~~
test.rs:57:16: 57:22 note: `class2` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:57     Latin_III: class2,
                          ^~~~~~
test.rs:58:17: 58:23 error: use of moved value: `class3`
test.rs:58     Algebra_II: class3,
                           ^~~~~~
test.rs:58:17: 58:23 note: `class3` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:58     Algebra_II: class3,
                           ^~~~~~
test.rs:59:21: 59:27 error: use of moved value: `class4`
test.rs:59     Honors_English: class4,
                               ^~~~~~
test.rs:59:21: 59:27 note: `class4` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:59     Honors_English: class4,
                               ^~~~~~
test.rs:60:10: 60:16 error: use of moved value: `class5`
test.rs:60     PRM: class5,
                    ^~~~~~
test.rs:60:10: 60:16 note: `class5` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:60     PRM: class5,
                    ^~~~~~
test.rs:61:21: 61:27 error: use of moved value: `class6`
test.rs:61     Honors_History: class6,
                               ^~~~~~
test.rs:61:21: 61:27 note: `class6` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:61     Honors_History: class6,
                               ^~~~~~
test.rs:62:13: 62:19 error: use of moved value: `class7`
test.rs:62     Health: class7,
                       ^~~~~~
test.rs:62:13: 62:19 note: `class7` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:62     Health: class7,
                       ^~~~~~
test.rs:63:16: 63:22 error: use of moved value: `class8`
test.rs:63     Chemistry: class8,
                          ^~~~~~
test.rs:63:16: 63:22 note: `class8` moved here because it has type `collections:
:string::String`, which is non-copyable
test.rs:63     Chemistry: class8,
                          ^~~~~~
error: aborting due to 8 previous errors

gistfile4.txt

Any Help? Thanks in advance!