Rust 借用

fn main(){
   // a list of nos
   let v = vec
![10,20,30];

   print_vector(v);
   println!("{}",v[0]); // this line gives error
}
fn print_vector(x:Vec<i32>){
   println!("Inside print_vector function {:?}",x);
}

|  print_vector(v);
|     - value moved here
|  println!("{}",v[0]);
|     ^ value used here after move

fn main(){
   // a list of nos
   let v = vec
![10,20,30];

   print_vector(&v); // passing reference
   println!("Printing the value from main() v[0]={}",v[0]);
}
fn print_vector(x:&Vec<i32>){
   println!("Inside print_vector function {:?}",x);
}

Inside print_vector function [10, 20, 30]
Printing the value from main() v[0] = 10

fn add_one(e: &mut i32) {
   *e+= 1;
}
fn main() {
   let mut i = 3;
   add_one(&mut i);
   println!("{}", i);
}

fn main() {
   let mut name:String = String::from("TutorialsPoint");
   display(&mut name); 
   //pass a mutable reference of name
   println!("The value of name after modification is:{}",name);
}
fn display(param_name:&mut String){
   println!("param_name value is :{}",param_name);
   param_name.push_str(" Rocks"); 
   //Modify the actual string,name
}

param_name value is :TutorialsPoint
The value of name after modification is:TutorialsPoint Rocks