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  1. //use std::fmt::Debug;
  2. //use std::io;
  3.  
  4. fn main() {
  5.     /*println!("Hello, world!");
  6.     println!("{} of {:b} people know binary, the other half doesn't", 1, 2);
  7.     println!("{number:>width$}", number=1, width=6);
  8.     println!("My name is {0}, {1} {0}", " Bond","james");*/
  9.    
  10.     #[derive(Debug)]
  11.     struct Structure(i32);
  12.     // However, custom types such as this structure require more complicated
  13.     // handling. This will not work.
  14.     println!("{:?}",  Structure(3));
  15.    
  16.     let formatted_number = format!("{:.*}",2,1.234567);
  17.     assert_eq!("1.23", formatted_number);
  18.     println!("{}",formatted_number);
  19.    
  20.     let pi = 3.141592;
  21.     let formatted_pi = format!("{:.*}",3, pi);
  22.     println!("Pi is roughly {}", formatted_pi);
  23.    
  24.     println!("{}", format!("{:.*}",3, 3.141592));
  25.    
  26.    
  27.    
  28.    
  29.    
  30.    
  31. }
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