C-printf Parser

约 219 字小于 1 分钟

2026-02-11

题目

There is a function in C language: printf. This function allows us to print something with formatting. Like this:

printf("The result is %d.", 42);

This challenge requires you to parse the input string and extract the format placeholders like %d and %f. For example, if the input string is "The result is %d.", the parsed result is a tuple ['dec'].

Here is the mapping:

type ControlsMap = {
  c: 'char',
  s: 'string',
  d: 'dec',
  o: 'oct',
  h: 'hex',
  f: 'float',
  p: 'pointer',
}

解题思路

待补充

答案

type ControlsMap = {
  c: 'char'
  s: 'string'
  d: 'dec'
  o: 'oct'
  h: 'hex'
  f: 'float'
  p: 'pointer'
}

type ParsePrintFormat = any

验证

import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<ParsePrintFormat<''>, []>>,
  Expect<Equal<ParsePrintFormat<'Any string.'>, []>>,
  Expect<Equal<ParsePrintFormat<'The result is %d.'>, ['dec']>>,
  Expect<Equal<ParsePrintFormat<'The result is %%d.'>, []>>,
  Expect<Equal<ParsePrintFormat<'The result is %%%d.'>, ['dec']>>,
  Expect<Equal<ParsePrintFormat<'The result is %f.'>, ['float']>>,
  Expect<Equal<ParsePrintFormat<'The result is %h.'>, ['hex']>>,
  Expect<Equal<ParsePrintFormat<'The result is %q.'>, []>>,
  Expect<Equal<ParsePrintFormat<'Hello %s: score is %d.'>, ['string', 'dec']>>,
  Expect<Equal<ParsePrintFormat<'The result is %'>, []>>,
]

参考

无