| 29 | } |
| 30 | |
| 31 | fn base_converter(mut dec_num: u32, base: u32) -> String { |
| 32 | // digits 对应各种余数的字符形式，尤其是 10 - 15 |
| 33 | let digits = ['0', '1', '2', '3', '4', '5', '6', '7', |
| 34 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']; |
| 35 | |
| 36 | // 余数入栈 |
| 37 | let mut rem_stack = Stack::new(); |
| 38 | while dec_num > 0 { |
| 39 | let rem = dec_num % base; |
| 40 | rem_stack.push(rem); |
| 41 | dec_num /= base; |
| 42 | } |
| 43 | |
| 44 | // 余数出栈并取对应字符来拼接成字符串 |
| 45 | let mut base_str = "".to_string(); |
| 46 | while !rem_stack.is_empty() { |
| 47 | let rem = rem_stack.pop().unwrap() as usize; |
| 48 | base_str += &digits[rem].to_string(); |
| 49 | } |
| 50 | |
| 51 | base_str |
| 52 | } |
| 53 | |
| 54 | fn main() { |
| 55 | let bin_str: String = base_converter(10, 2); |