1//! # demothree 2//! 3//! demothree xxx 4//! calculate 5 6/// Add one to the number give 7/// 8/// # Example 9/// 10/// ``` 11/// let args= 5; 12/// let answer = demothirteen::add_one(args); 13/// 14/// assert_eq!(6,answer); 15/// ``` 16 17pub fn add_one(x:i32)->i32{ 18 x+1 19}