Rust 格式输出

格式输出由一系列定义在 std::fmt 中的宏提供。

包含:

format! : 输出格式化的字符串。

print! : 输出格式化的字符串到控制台(终端)

println!: 添加一个换行,输出格式化的字符串到控制台(终端)

println!("Guess the number!");
 
输出:

Guess the number!

println!("{} days", 31);
 
输出:

31 days

println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
 
输出:

Alice, this is Bob. Bob, this is Alice

println!("{subject} {verb} {object}",
             object="the lazy dog",
             subject="the quick brown fox",
             verb="jumps over");
 
输出:

the quick brown fox jumps over the lazy dog

println!("{} of {:b} people know binary, the other half don't", 1, 2);
 
输出:

1 of 10 people know binary, the other half don't

println!("{number:>width$}", number=1, width=6);
 
输出:

“ 1” // 引號是为了显示数字1的前面有五个空白字符而加上的,实际没有。

println!("{number:>0width$}", number=1, width=6);
 
输出:

000001

println!("My name is {0}, {1} {0}.”, "Bond","James");
 

输出:

My name is Bond, James Bond

很多其它语法:http://doc.rust-lang.org/std/fmt/