This commit is contained in:
ehlxr 2020-07-05 22:28:32 +08:00
parent 26ab99279a
commit 73d2fae7cd

View File

@ -22,7 +22,8 @@ fn main() {
let x = x + 1;
println!("The value of x is {}", x);
let x = "test";
// let x = "test";
let x: &'static str = "test";
println!("The value of x is {}", x);
// 可变变量
@ -1025,14 +1026,12 @@ fn main() {
// File::create(fnames).unwrap()
// }
Err(e) => match e.kind() {
ErrorKind::NotFound => {
match File::create(fnames) {
Ok(f) => f,
Err(e) => panic!("Problem creating the file: {:?}", e),
}
}
ErrorKind::NotFound => match File::create(fnames) {
Ok(f) => f,
Err(e) => panic!("Problem creating the file: {:?}", e),
},
oe => panic!("Problem opening the file: {:?}", oe),
}
},
};
println!("{:?}", file);
@ -1042,6 +1041,15 @@ fn main() {
Message::Write(s) => println!("{}", s),
abc => println!("{:?}", abc),
}
let nms = vec![String::from("Blue"), String::from("Yellow")];
let x4 = &[String::from("Blue"), String::from("Yellow")];
println!("{:?} {:?}", nms, x4);
// let a = [1, 2, 3, 4, 5];
let slice = &[1,2];
}
fn test_tuple(t: (i32, &str)) {