情况：您是一名高中老师，正在教您的计算机课如何编写C程序。但是，由于这只是该术语的开始，因此您尚未教他们缩进和间距的重要性。当您标记他们的工作时，您的眼睛受了如此巨大的伤害，以至于痛苦地尖叫着，并意识到这种情况无法持续。

任务：您已决定编写一种使用任何语言的程序，该程序都将有效的C源代码作为输入并以正确的格式输出。您应该确定什么是格式正确的代码，因为这是一场人气竞赛。鼓励您实现尽可能多的功能，以下是一些示例：

• 在每行的开头添加适当的缩进
• 在,和其他运算符之后添加空格，例如转换int a[]={1,2,3};为int a[] = {1, 2, 3};。记住不要在字符串文字中处理运算符。
• 每行后删除尾随空格
• 将陈述分为几行，例如，学生可以写一行tmp=a;a=b;b=tmp;或int f(int n){if(n==1||n==2)return 1;else return f(n-1)+f(n-2);}全部写成一行，则可以将它们分成不同的行。请注意for循环，它们中包含分号，但我真的不认为应该将它们分开。
• 定义每个函数后添加新行
• 您还可以使用其他功能来理解学生的代码。

获胜标准：这是一次人气竞赛，因此多数投票的答案都将赢得。如果出现平局，则以实施最多功能的答案为准。如果那又是平局，则最短的代码获胜。

建议您在答案中包括已实现的功能列表以及示例输入和输出。

编辑：根据注释中的请求，这里是一个示例输入，但是请记住，这只是参考，建议您实现尽可能多的功能。

输入：

#include <stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n"); //Semicolon added in the string just to annoy you
             /* Now we take the input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
        s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
}}printf("Your name in upper case is:\n%s\n",s);
   return 0;}

这就是我通常格式化此代码的方式：（我是个懒人）

#include <stdio.h>
#include <string.h>
int main() {
    int i;
    char s[99];
    printf("----------------------\n;;What is your name?;;\n----------------------\n"); //Semicolon added in the string just to annoy you
    /* Now we take the input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++) {
        if(s[i]>='a'&&s[i]<='z') {
            s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
        }
    }
    printf("Your name in upper case is:\n%s\n",s);
    return 0;
}

我认为这是更容易理解的方式：

#include <stdio.h>
#include <string.h>
int main() {
    int i;
    char s[99];
    printf("----------------------\n;;What is your name?;;\n----------------------\n"); //Semicolon added in the string just to annoy you
    /* Now we take the input: */
    scanf("%s", s);
    for(i = 0; i < strlen(s); i++) {
        if(s[i] >= 'a' && s[i] <= 'z') {
            s[i] -= ('a' - 'A'); //this is same as s[i]=s[i]-'a'+'A'
        }
    }
    printf("Your name in upper case is:\n%s\n", s);
    return 0;
}

另外，既然我已经开始有了答案，则在最后一个答案之后的5天之内，将接受投票数最高的答案，即，如果5天内没有其他新答案，则本次比赛将结束。

因为我们在讨论缩进和空格，所以我们只需要用一种实际上是围绕空格设计的语言来编写代码，那是最简单的，对吧？

所以解决方案是：

这是在base64中：

ICAgCQogICAgCgkJICAgIAkgCiAgICAKCQkgICAgCQkKICAgIAoJCSAgICAJICAKICAgIAoJCSAgICAJIAkKICAgIAoJCSAKIAogCQoKICAgCSAKICAgCQoJCQkgICAJCQkgCQkKCSAgCQoJICAJICAKICAgCQoJCQkgICAJIAkgCgkgIAkKCSAgCSAJCiAgIAkKCQkJICAgCSAgCQoJICAJCgkgIAkgCQogICAJCgkJCSAgIAkgICAgIAoJICAJCgkgIAkgCQogICAJCgkJCSAgIAkJCQkJIAkKCSAgCQoJICAJCSAKICAgCQoJCQkgICAJICAgCSAKCSAgCQoJICAJICAgIAogICAJCgkJCSAgIAkgCSAgIAoJICAJCgkgIAkgICAJCQogICAJCgkJCSAgIAkgCSAgCQoJICAJCgkgIAkgIAkgIAogICAJIAogICAJCgkJIAogCSAJCQkKICAgCQoJCQkJCiAgCgkKCiAgIAkgIAogICAJCgkJCQkKICAKCQoKICAgCSAJCgoJCgogICAJCSAKICAgCQkKICAgCQkKCQkJICAgCQoJICAJCQkgICAgCSAKICAgCQoJCSAKIAkgCQkJCiAgIAkKCQkJCQogIAoJCgogICAJICAgIAogICAJIAogICAJIAoJCSAKIAkgCQkJCiAgIAkKCQkJCQogIAoJCgogICAJICAgCQkKICAgCSAJCiAgIAkgCQoJCQkgICAJCgkgICAJCSAgICAJIAogICAJCgkJIAogCSAJCQkKICAgCQoJCQkJCiAgCgkKCiAgIAkgIAkgIAogICAJIAkKICAgCSAJCgkJCSAgIAkKCSAgCQkJICAgIAkgCiAgIAkKCQkgCiAJIAkJCQogICAJCgkJCQkKICAKCQoKICAgCQkKICAgCQoJCQkgICAJIAkgCgkgIAkKCSAgCQkgIAogICAJCgkJCSAgIAkJCQkgCQkKCSAgCQoJICAJCSAJCiAgIAkKCQkJICAgCQkJCQkgCQoJICAJCgkgIAkJCSAKICAgCQoJCQkgICAJCQkgCQkKCSAgCQoJICAJCQkJCiAgIAkKCQkJICAgCSAgIAkgCgkgIAkKCSAgCQkgCQkKICAgCQoJCQkgICAJIAkgCSAKCSAgCQoJICAJCQkgIAogICAJCgkJCSAgIAkgCQkJCQoJICAJCgkgIAkJCSAJCiAgIAkKCQkJICAgCSAJICAgCgkgIAkKCSAgCSAgCSAJCiAgIAkKCQkJICAgCSAJICAJCgkgIAkKCSAgCSAgCQkgCiAgIAkKCQkJCQogIAoJCgogICAJCSAgCiAgIAkgCiAgICAKCQkgCgkKCiAgIAkJIAkKICAgCQoJCQkJCiAgICAgCSAKICAgIAoJCSAgICAJCQogICAJCQoJCQkgICAJCgkgICAJCSAKCQoKICAgCQkJIAogICAJCQogICAJCQoJCQkgICAJCgkgIAkJCSAKIAkgCQkJCiAgIAkKCQkJCQogICAgIAkgCiAgICAKCQkgCgkKCiAgIAkJCQkKICAgCQoJCQkJCiAgICAgCSAJCgkJCQoJICAJIAkgCgoJCgogICAJICAJCQkKICAgCSAKICAgIAoJCSAKCQoKICAgCQkgCQkKICAgCQoJCQkJCiAgICAgCSAKICAgCSAKCQkgCgkKCiAgIAkJCSAgCiAgIAkgIAoJCQkgICAJIAkJCQkKCSAgCQoJICAJCQkJIAogICAJCgkJCQkKICAKCQoKICAgCQkJIAkKICAgCSAgCgkJCSAgIAkgCQkJCQoJICAJCgkgIAkJCQkJCiAgIAkKCQkJCQogIAoJCgogICAJCQkJIAogICAJCgkJCQkKICAgICAJIAogICAJCQoJCSAKCQoKICAgCQkJCQkKICAgCQoJCQkJCiAgICAgCSAKICAgCSAgCgkJIAoJCgogICAJICAJIAkKICAgCSAJCiAgIAkgCQoJCQkgICAJCgkgICAJCSAgICAJCgkJCQkKICAKCQoKICAgCSAgCQkgCiAgIAkgCQogICAJIAkKCQkJICAgCQoJICAJCQkgICAgCQoJCQkJCiAgCgkKCiAgIAkJCQogICAJIAkgCgkKICAgICAJCQoJCQkKICAgCSAgCQogCiAKCSAgCSAgIAogCiAKCQkgCSAgIAogICAJICAgICAKCQogICAgIAkgICAgIAoJCiAgICAgCQoJICAJCiAKIAkgIAkKCiAgIAkgICAKCgkKCiAgIAkgCSAJCiAgIAkKCQkJICAgCSAJIAoJICAJCgkgIAkJICAgCiAgIAkKCQkJICAgCSAgIAkgCgkgIAkKCSAgCQkgIAkKICAgCQoJCQkJCiAgCgkKCiAgIAkJICAgCiAgIAkgCiAgICAKCQkgCgkKCiAgIAkJICAJCiAgIAkgIAoJCQkgICAJIAkJCSAgCgkgIAkKCSAgCQkgCSAKICAgCSAKICAgCQoJCSAgICAJCgkJCQkKICAKCQoKICAgCQkgCSAKICAgCQoJCQkJCiAgCgkKCiAgIAkgCQkgCiAgIAkKCQkJICAgCSAJCQkJCgkgIAkKCSAgCSAgICAgCiAgIAkKCQkJCQogIAoJCgogICAJICAgICAKICAgCSAgCgkJCSAgIAkgCSAJIAoJICAJCgkgIAkgICAgCQogICAJCgkJCQkKICAKCQoKICAgCSAgICAJCiAgIAkKCQkJCQogICAgIAkgCiAgIAkKCQkgCgkKCiAgIAkgCQkJCiAgIAkKCQkJICAgCSAJIAoJICAJCgkgIAkgICAJIAogICAJCgkJCQkKICAKCQoKICAgCSAgIAkgCiAgIAkgCiAgICAKCQkgCgkKCiAgIAkKICAgCSAgCiAgIAkKCQkJCQkgICAgCQoJCgkgICAgCSAKCQkJCgkgIAkgCSAKICAgCSAKCQkJICAgCQoJICAJCgkgIAkgICAJCiAgIAkgCgkJCSAgIAkgCgkgIAkKCSAgCSAgCSAKICAgCSAKCQkJICAgCQkKCSAgCQoJICAJICAJCQogICAJIAoJCQkgICAJICAKCSAgCQoJICAJIAkgIAoKICAgCSAgIAkKCiAJIAkJCgogCiAJIAkJCgogICAJIAkgCgogCSAJIAoKIAogCSAJCQoKICAgCSAgCSAKCiAJIAkgCSAJCgogCiAJIAkJCgogICAJICAJCQoKIAkgCSAJCSAKCiAKIAkgCQkKCiAgIAkgCSAgCgogCSAJIAkJCQoKICAgCSAJCQoKIAogCQoKCgo=

对于那些在纸上打印代码有问题的人，这里是带注释的版本（您可以在答案的结尾找到一个编译器）：

# heap structure:
# 1: read buffer
# 2: parser state
#   0: before indentation
#   1: after indentation
#   2: inside a string literal
#   3: inside a multiline comment
#   4: inside a single line comment
# 3: identation
# 4: old read buffer
# 5: parenthesis nesting amount

# -------------------
# initialize heap
# -------------------
SS 1 | SS 0 | TTS # [1] := 0
SS 2 | SS 0 | TTS # [2] := 0
SS 3 | SS 0 | TTS # [3] := 0
SS 4 | SS 0 | TTS # [4] := 0
SS 5 | SS 0 | TTS # [5] := 0
LSL 1 # goto L1

# -------------------
# sub: determine what to do in state 0
# -------------------
LSS 2 # LABEL L2
SS 1 | TTT | SS  59 | TSST | LTS 4 # if [1] == ; GOTO L4
SS 1 | TTT | SS  10 | TSST | LTS 5 # if [1] == \n GOTO L5
SS 1 | TTT | SS   9 | TSST | LTS 5 # if [1] == \t GOTO L5
SS 1 | TTT | SS  32 | TSST | LTS 5 # if [1] == ' ' GOTO L5
SS 1 | TTT | SS 125 | TSST | LTS 6 # if [1] == } GOTO L6
SS 1 | TTT | SS  34 | TSST | LTS 16 # if [1] == " GOTO L16
SS 1 | TTT | SS  40 | TSST | LTS 35 # if [1] == ( GOTO L35
SS 1 | TTT | SS  41 | TSST | LTS 36 # if [1] == ) GOTO L36

SS 2 | SS 1 | TTS # [2] := 1
LST 7 # call L7
SS 1 | TTT | TLSS # print [1]
LTL # return

LSS 4 # label L4 - ; handler
SS 1 | TTT | TLSS # print [1]
LTL # return

LSS 5 # label L5 - WS handler
LTL # return

LSS 6 # label L6 - } handler
# decrease identation by one
SS 3 | SS 3 | TTT | SS 1 | TSST | TTS # [3] := [3] - 1
SS 2 | SS 1 | TTS # [2] := 1
LST 7 # call L7
SS 1 | TTT | TLSS # print [1]
LTL # return

LSS 16 # label L16 - " handler
SS2 | SS 2 | TTS # [2] := 2
LST 7 # call L7
SS1 | TTT | TLSS # print [1]
LTL

LSS 35
SS 5 | SS 5 | TTT | SS 1 | TSSS | TTS # [5] := [5] + 1
SS 2 | SS 1 | TTS # [2] := 1
LST 7 # call L7
SS1 | TTT | TLSS # print [1]
LTL

LSS 36
SS 5 | SS 5 | TTT | SS 1 | TSST | TTS # [5] := [5] - 1
SS 2 | SS 1 | TTS # [2] := 1
LST 7 # call L7
SS1 | TTT | TLSS # print [1]
LTL

# -------------------
# sub: determine what to do in state 1
# -------------------
LSS 3 # LABEL L3
SS 1 | TTT | SS  10 | TSST | LTS 12 # if [1] == \n GOTO L12
SS 1 | TTT | SS 123 | TSST | LTS 13 # if [1] == { GOTO L13
SS 1 | TTT | SS 125 | TSST | LTS 14 # if [1] == } GOTO L14
SS 1 | TTT | SS  59 | TSST | LTS 15 # if [1] == ; GOTO L15
SS 1 | TTT | SS  34 | TSST | LTS 27 # if [1] == " GOTO L27
SS 1 | TTT | SS  42 | TSST | LTS 28 # if [1] == * GOTO L28
SS 1 | TTT | SS  47 | TSST | LTS 29 # if [1] == / GOTO L29
SS 1 | TTT | SS  40 | TSST | LTS 37 # if [1] == ( GOTO L37
SS 1 | TTT | SS  41 | TSST | LTS 38 # if [1] == ) GOTO L38
SS 1 | TTT | TLSS # print [1]
LTL # return

LSS 12 # LABEL L12 - \n handler
SS 2 | SS 0 | TTS # [2] := 0
LTL # return

LSS 13 # LABEL L13 - { handler
SS 1 | TTT | TLSS # print [1]
SS 2 | SS 0 | TTS # [2] := 0
SS 3 | SS 3 | TTT | SS 1 | TSSS | TTS # [3] := [3] + 1
LTL # return

LSS 14 # LABEL L14 - } handler
SS 3 | SS 3 | TTT | SS 1 | TSST | TTS # [3] := [3] - 1
LST 7 # call L7
SS 1 | TTT | TLSS # print [1]
SS 2 | SS 0 | TTS # [2] := 0
LTL # return

LSS 15 # LABEL L15 - ; handler
SS 1 | TTT | TLSS # print [1]
SS 5 | TTT | LTS 10 # if [5] == 0 GOTO L39
LTL

LSS 39
SS 2 | SS 0 | TTS # [2] := 0
LTL # return

LSS 27 # label L27 - " handler
SS1 | TTT | TLSS # print [1]
SS2 | SS 2 | TTS # [2] := 2
LTL

LSS 28 # label L28 - * handler - this might start a comment
SS 4 | TTT | SS  47 | TSST | LTS 30 # if [4] == / GOTO L30
SS1 | TTT | TLSS # print [1]
LTL

LSS 29 # label L29 - / handler - this might start a comment
SS 4 | TTT | SS  47 | TSST | LTS 31 # if [4] == / GOTO L31
SS1 | TTT | TLSS # print [1]
LTL

LSS 30 # label L30 - /* handler
SS1 | TTT | TLSS # print [1]
SS2 | SS 3 | TTS # [2] := 3
LTL

LSS 31 # label L31 - // handler
SS1 | TTT | TLSS # print [1]
SS2 | SS 4 | TTS # [2] := 4
LTL

LSS 37
SS 5 | SS 5 | TTT | SS 1 | TSSS | TTS # [5] := [5] + 1
SS1 | TTT | TLSS # print [1]
LTL

LSS 38
SS 5 | SS 5 | TTT | SS 1 | TSST | TTS # [5] := [5] - 1
SS1 | TTT | TLSS # print [1]
LTL

# -------------------
# sub: print identation
# -------------------
LSS 7 # label L7 - print identation
SS 10 | TLSS # print \n
SS 3 | TTT # push [3]
LSS 9 # label L9 - start loop
SLS | LTS 8 # if [3] == 0 GOTO L8
SLS | LTT 8 # if [3] < 0 GOTO L8 - for safety
SS 32 | TLSS # print ' '
SS 32 | TLSS # print ' '
SS 1  | TSST # i := i - 1
LSL 9 # GOTO L9
LSS 8 # label L8 - end loop
LTL #

# -------------------
# sub: L21 - string literal handler
# -------------------
LSS 21
SS 1 | TTT | SS  10 | TSST | LTS 24 # if [1] == \n GOTO L24
SS 1 | TTT | SS  34 | TSST | LTS 25 # if [1] == " GOTO L25
SS 1 | TTT | TLSS # print [1]
LTL

LSS 24 # \n handler - this should never happen, but let's be prepared and reset the parser
SS 2 | SS 0 | TTS # [2] := 0
LTL # return

LSS 25 # " handler - this might be escaped, so be prepared
SS 4 | TTT | SS  92 | TSST | LTS 26 # if [4] == \ GOTO L26
SS 2 | SS 1 | TTS # [2] := 1
SS 1 | TTT | TLSS # print [1]
LTL

LSS 26 # \\" handler - escaped quotes don't finish the literal
SS 1 | TTT | TLSS # print [1]
LTL

# -------------------
# sub: L22 - multiline comment handler
# -------------------
LSS 22
SS 1 | TTT | SS  47 | TSST | LTS 32 # if [1] == / GOTO L32
SS 1 | TTT | TLSS # print [1]
LTL

LSS 32
SS 4 | TTT | SS  42 | TSST | LTS 33 # if [4] == * GOTO L33
SS 1 | TTT | TLSS # print [1]
LTL

LSS 33
SS 1 | TTT | TLSS # print [1]
SS 2 | SS 1 | TTS # [2] := 1
LTL
# -------------------
# sub: L23 - singleline comment handler
# -------------------
LSS 23
SS 1 | TTT | SS  10 | TSST | LTS 34 # if [1] == \n GOTO L34
SS 1 | TTT | TLSS # print [1]
LTL

LSS 34
SS 2 | SS 0 | TTS # [2] := 0
LTL

# -------------------
# main loop
# -------------------
LSS 1 # LABEL L1
SS 4 | SS 1 | TTT | TTS # [4] := [1]
SS 1 | TLTS # [1] := read

SS 2 | TTT | LTS 10 # if [2] == 0 GOTO L10
SS 2 | TTT | SS 1 | TSST | LTS 17 # if [2] == 1 GOTO L17
SS 2 | TTT | SS 2 | TSST | LTS 18 # if [2] == 2 GOTO L18
SS 2 | TTT | SS 3 | TSST | LTS 19 # if [2] == 3 GOTO L19
SS 2 | TTT | SS 4 | TSST | LTS 20 # if [2] == 4 GOTO L20

LSS 17
LST 3  # call L3
LSL 11 # GOTO L11

LSS 10 # label L10
LST 2  # call L2
LSL 11

LSS 18
LST 21
LSL 11

LSS 19
LST 22
LSL 11

LSS 20
LST 23

LSS 11 # label L11
LSL 1  # goto L1
LLL # END

这项工作仍在进行中，尽管希望它可以通过大多数标准！

当前支持的功能：

• 根据{和}字符修复标识。
• 在之后添加换行符 ;
• 处理字符串文字内的缩进字符（包括遇到时未关闭字符串文字的事实\"）
• 处理单行和多行注释中的缩进字符
• 如果在括号内（如for块），则不添加换行符

输入示例（我添加了一些基于Quincunx注释的边缘案例，因此您可以检查其行为是否正常）：

    /* Hai Worldz. This code is to prevent formatting: if(this_code_is_touched){,then+your*program_"doesn't({work)}correctl"y.} */
#include<stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n\""); //Semicolon added in the {;} string just to annoy you
             /* Now we take the {;} input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
        s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
}}printf("Your \"name\" in upper case is:\n%s\n",s);
   return 0;}

输出示例：

[~/projects/indent]$ cat example.c | ./wspace indent.ws 2>/dev/null

/* Hai Worldz. This code is to prevent formatting: if(this_code_is_touched){,then+your*program_"doesn't({work)}correctl"y.} */
#include<stdio.h>
#include<string.h>
int main() {
  int i;;
  char s[99];;
  printf("----------------------\n;;What is your name?;;\n----------------------\n\"");; //Semicolon added in the {;} string just to annoy you
  /* Now we take the {;} input: */
  scanf("%s",s);;
  for(i=0;i<strlen(s);i++){
    if(s[i]>='a'&&s[i]<='z'){
      s[i]-=('a'-'A');; //this is same as s[i]=s[i]-'a'+'A'
    }
  }
  printf("Your \"name\" in upper case is:\n%s\n",s);;
  return 0;;
}

请注意，由于空白不支持EOF，因此检查解释器会引发异常，我们需要对此进行抑制。由于在空白中无法检查EOF（据我所知，这是我的第一个空白程序），这是不可避免的，我希望解决方案仍然有效。

这是我用来将带注释的版本编译为适当的空格的脚本：

#!/usr/bin/env ruby
ARGF.each_line do |line|
  data = line.gsub(/'.'/) { |match| match[1].ord }
  data = data.gsub(/[^-LST0-9#]/,'').split('#').first
  if data
    data.tr!('LST',"\n \t")
    data.gsub!(/[-0-9]+/){|m| "#{m.to_i<0?"\t":" "}#{m.to_i.abs.to_s(2).tr('01'," \t")}\n" }
    print data
  end
end

跑步：

./wscompiler.rb annotated.ws > indent.ws

需要注意的是这一点，除了转换S，L和T人物，也允许与单行注释#，并能自动转换数字和简单字符文字到他们的空格表示。如果需要，可将其随意用于其他空白项目

Vim 简单，从技术上讲只使用一个字符：=

我不是vim专家，但我从未低估它的功能，有人认为它是一种编程语言。对我来说，这个解决方案还是一个赢家。

在vim中打开文件：

vim file.c

在vim中按以下键

gg=G

说明：

gg 转到文件顶部

= 是修复缩进的命令

G 告诉它执行操作到文件末尾。

您可以保存并退出 :wq

可以vim从命令行运行命令，因此也可以单行执行，但是我将其留给vim比我更了解的人。

Vim举例说明 有效的输入文件（fibonacci.c），缩进错误。

/* Fibonacci Series c language */
#include<stdio.h>

int main()
{
int n, first = 0, second = 1, next, c;

            printf("Enter the number of terms\n");
scanf("%d",&n);
  printf("First %d terms of Fibonacci series are :-\n",n);

          for ( c = 0 ; c < n ; c++ )
   {
if ( c <= 1 )
         next = c;
 else
                                     {
next = first +    second;
              first = second;
        second = next;
      }
      printf("%d\n",next);
   }
 return 0;
}

在vim中打开：vim fibonacci.c按gg=G

/* Fibonacci Series c language */
#include<stdio.h>

int main()
{
  int n, first = 0, second = 1, next, c;

  printf("Enter the number of terms\n");
  scanf("%d",&n);
  printf("First %d terms of Fibonacci series are :-\n",n);

  for ( c = 0 ; c < n ; c++ )
  {
    if ( c <= 1 )
      next = c;
    else
    {
      next = first +    second;
      first = second;
      second = next;
    }
    printf("%d\n",next);
  }
  return 0;
}

由于这将用于帮助老师更好地理解学生的代码，因此首先清理输入内容非常重要。预处理器指令是无用的，因为它们只会造成混乱，并且宏也可能将恶意代码引入文件中。我们不想要那个！另外，完全没有必要保留学生写的原始评论，因为它们可能完全是无用的。

相反，众所周知，好的代码除了修复缩进和结构外，还需要好的注释，为什么不在代码的要点周围添加一些非常有用的注释，以使结果更易于理解！这绝对可以帮助老师评估学生所做的工作！

所以从这个：

    /* Hai Worldz. This code is to prevent formatting: if(this_code_is_touched){,then+your*program_"doesn't({work)}correctl"y.} */
#include<stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n\""); //Semicolon added in the {;} string just to annoy you
             /* Now we take the {;} input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
        s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
}}printf("Your \"name\" in upper case is:\n%s\n",s);
   return 0;}

让我们产生这个：

int main() {
    /* This will declare i. */
    int i;
    /* This will declare s[99]. */
    char s[99];
    /* This will call the function called printf with 1 parameters */
    printf("----------------------\n;;What is your name?;;\n----------------------\n\"");
    /* This will call the function called scanf with 2 parameters */
    scanf("%s", s);
    /* This will start a for loop, with initializator i = 0. It will loop until i < strlen(s), and will i++ at each iteration */
    for (i = 0; i < strlen(s); i++) {
        /* This will check, whether s[i] >= 'a' && s[i] <= 'z' is true or not. */
        if (s[i] >= 'a' && s[i] <= 'z') {
            s[i] -= 'a' - 'A';
        }
    }
    /* This will call the function called printf with 2 parameters */
    printf("Your \"name\" in upper case is:\n%s\n", s);
    /* This will return from the function. */
    return 0;
}

围绕表达式使用所有有用的注释会更好吗？

所以这是一个利用宝石的红宝石解决方案cast，它是一个C解析器_{（是的，我在作弊）}。因为这将解析代码，然后从头开始重新打印，这意味着结果将完美缩进并且也保持一致，例如：

• 根据块级别在代码中正确缩进
• 表达式，语句，条件等周围的空格保持一致
• 根据代码的结构完全缩进
• 等等

并且还将包含有关代码工作方式的非常有用的注释，这对学生和老师都将非常有用！

indent.rb

#!/usr/bin/env ruby
require 'cast'

code = ''
ARGF.each_line do |line|
  if line=~/\A#/
    code << "// #{line.strip}\n"
  else
    code << line
  end
end

class Comment < C::Literal
  field :val
  initializer :val
  def to_s
    "/* #{val} */"
  end
end

tree = C.parse(code)
tree.preorder do |n|
  break if n.kind_of?(Comment)
  if n.kind_of?(C::Declaration)
    dd = []
    n.declarators.each do |d|
      dd << "declare #{d.indirect_type ? d.indirect_type.to_s(d.name) : d.name}"
      dd.last << " and set it to #{d.init}" if d.init
    end
    unless dd.empty?
      n.insert_prev(Comment.new("This will #{dd.join(", ")}."))
    end
  end rescue nil
  n.parent.insert_prev(Comment.new("This will call the function called #{n.expr} with #{n.args.length} parameters")) if n.kind_of?(C::Call) rescue nil
  n.insert_prev(Comment.new("This will start a for loop, with initializator #{n.init}. It will loop until #{n.cond}, and will #{n.iter} at each iteration")) if n.kind_of?(C::For) rescue nil
  n.insert_prev(Comment.new("This will check, whether #{n.cond} is true or not.")) if n.kind_of?(C::If) rescue nil
  n.insert_prev(Comment.new("This will return from the function.")) if n.kind_of?(C::Return) rescue nil
end

puts tree

Gemfile

source "http://rubygems.org"
gem 'cast', '0.2.1'

重击，35个字符

输入文件必须命名为“ input.c”，并放置在当前工作目录中。

sh <(wget -q -O- http://x.co/3snpk)

示例输出，已经在原始问题中输入了输入：

根据您的硬件，可能需要花费几秒钟来运行，因此请耐心等待:)

红宝石

code = DATA.read

# first, we need to replace strings and comments with tilde escapes to avoid parsing them
code.gsub! '~', '~T'
lineComments = []
code.gsub!(/\/\/.*$/) { lineComments.push $&; '~L' }
multilineComments = []
code.gsub!(/\/\*.*?\*\//m) { multilineComments.push $&; '~M' }
strs = []
code.gsub!(/"(\\.|[^"])*"|'.'/) { strs.push $&; '~S' } # character literals are considered strings

# also, chop out preprocessor stuffs
preprocessor = ''
code.gsub!(/(^#.*\n)+/) { preprocessor = $&; '' }

# clean up newlines and excess whitespace
code.gsub! "\n", ' '
code.gsub! /\s+/, ' '
code.gsub!(/[;{}]/) { "#{$&}\n" }
code.gsub!(/[}]/) { "\n#{$&}" }
code.gsub! /^\s*/, ''
code.gsub! /\s+$/, ''

# fix for loops (with semicolons)
code.gsub!(/^for.*\n.*\n.*/) { $&.gsub ";\n", '; ' }

# now it's time for indenting; add indent according to {}
indentedCode = ''
code.each_line { |l|
    indentedCode += ('    ' * [indentedCode.count('{') - indentedCode.count('}') - (l =~ /^\}/ ? 1 : 0), 0].max) + l
}
code = indentedCode

# finally we're adding whitespace for more readability. first get a list of all operators
opsWithEq = '= + - * / % ! > < & | ^ >> <<'
opsNoEq = '++ -- && ||'
ops = opsWithEq.split + opsWithEq.split.map{|o| o + '=' } + opsNoEq.split
ops = ops.sort_by(&:length).reverse
# now whitespace-ize them
code.gsub!(/(.)(#{ops.map{|o| Regexp.escape o }.join '|'})(.)/m) { "#{$1 == ' ' ? ' ' : ($1 + ' ')}#{$2}#{$3 == ' ' ? ' ' : (' ' + $3)}" }

# special-cases: only add whitespace to the right
ops = ','.split
code.gsub!(/(#{ops.map{|o| Regexp.escape o }.join '|'})(.)/m) { "#{$1}#{$2 == ' ' ? ' ' : (' ' + $2)}" }
# special-cases: only add whitespace to the left
ops = '{'.split
code.gsub!(/(.)(#{ops.map{|o| Regexp.escape o }.join '|'})/m) { "#{$1 == ' ' ? ' ' : ($1 + ' ')}#{$2}" }

# replace the tilde escapes and preprocessor stuffs
stri = lci = mci = -1
code.gsub!(/~(.)/) {
    case $1
    when 'T'
        '~'
    when 'S'
        strs[stri += 1]
    when 'L'
        lineComments[lci += 1] + "\n#{code[0, $~.begin(0)].split("\n").last}"
    when 'M'
        multilineComments[mci += 1]
    end
}
code = (preprocessor + "\n" + code).gsub /^ +\n/, ''

puts code
__END__
    /* Hai Worldz. This code is to prevent formatting: if(this_code_is_touched){,then+your*program_"doesn't({work)}correctl"y.} */
#include<stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n\""); //Semicolon added in the {;} string just to annoy you
             /* Now we take the {;} input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
        s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
}}printf("Your \"name\" in upper case is:\n%s\n",s);
   return 0;}

输出：

#include <stdio.h>
#include<string.h>

int main() {
    int i;
    char s[99];
    printf("----------------------\n;;What is your name?;;\n----------------------\n");
    //Semicolon added in the string just to annoy you
     /* Now we take the input: */ scanf("%s", s);
    for(i = 0; i < strlen(s); i ++ ) {
        if(s[i] >= 'a' && s[i] <= 'z') {
            s[i] -= ('a' - 'A');
            //this is same as s[i]=s[i]-'a'+'A'
        }
    }
    printf("Your name in upper case is:\n%s\n", s);
    return 0;
}

输出为@ SztupY边缘的情况下输入：

#include<stdio.h>
#include<string.h>

/* Hai Worldz. This code is to prevent formatting: if(this_code_is_touched){,then+your*program_"doesn't({work)}correctl"y.} */ int main() {
    int i;
    char s[99];
    printf("----------------------\n;;What is your name?;;\n----------------------\n\"");
    //Semicolon added in the {;} string just to annoy you
     /* Now we take the {;} input: */ scanf("%s", s);
    for(i = 0; i < strlen(s); i ++ ) {
        if(s[i] >= 'a' && s[i] <= 'z') {
            s[i] -= ('a' - 'A');
            //this is same as s[i]=s[i]-'a'+'A'
        }
    }
    printf("Your \"name\" in upper case is:\n%s\n", s);
    return 0;
}

到目前为止的功能：

• [x] 在每行的开头添加适当的缩进
• [x]在,和其他运算符之后添加空格，例如转换int a[]={1,2,3};为int a[] = {1, 2, 3};。记住不要在字符串文字中处理运算符。
• [x] 每行后删除尾随空格
• [x]将陈述分为几行，例如，学生可以写一行tmp=a;a=b;b=tmp;或int f(int n){if(n==1||n==2)return 1;else return f(n-1)+f(n-2);}全部写成一行，则可以将它们分成不同的行。请注意for循环，它们中包含分号，但我真的不认为应该将它们分开。
• [ ] 定义每个函数后添加新行
• [ ] 您还可以使用其他功能来理解学生的代码。

这是用python编写的，基于GNU编码标准。

到目前为止的功能：

• 缩进块
• 分割线（可能分割不应该的东西）
• GNU样式的函数定义

码：

import sys

file_in = sys.argv[1]

# Functions, for, if, while, and switch statements
def func_def(string):
    ret = ["", "", ""]
    func_name = ""
    paren_level = -1
    consume_id = False

    for x in string[::-1]:
        if x == "{":
            ret[2] = "{"
        elif ret[1] == "":
            if x == "(":
                paren_level -= 1
                func_name += x
            elif x == ")":
                paren_level += 1
                func_name += x
            elif paren_level == -1 and x.isspace():
                if consume_id:
                    ret[1] = func_name[::-1]
            elif paren_level == -1:
                consume_id = True
                func_name += x
            else:
                func_name += x
        else:
            # Return Type
            ret[0] += x
    else:
        ret[1] = func_name[::-1]

    ret[0] = ret[0][::-1]

    # Handle the case in which this is just a statement
    if ret[1].split("(")[0].strip() in ["for", "if", "while", "switch"]:
        ret = [ret[1], ret[2]] # Don't print an extra line

    return ret

with open(file_in) as file_obj_in:
    line_len = 0
    buffer = ""
    in_str = False
    no_newline = False
    indent_level = 0
    tab = " " * 4
    no_tab = False
    brace_stack = [-1]

    while True:
        buffer += file_obj_in.read(1)
        if buffer == "":
            break
        elif "\n" in buffer:
            if not no_newline:
                print(("" if no_tab else indent_level * tab) + buffer, end="")
                buffer = ""
                line_len = indent_level * 4
                no_tab = False
                continue
            else:
                buffer = ""
                line_len = indent_level * 4
                no_newline = False
                continue
        elif buffer[-1] == '"':
            in_str = not in_str
        elif buffer.isspace():
            buffer = ""
            continue

        if "){" in "".join(buffer.split()) and not in_str:
            for x in func_def(buffer):
                print(indent_level * tab + x)
            buffer = ""
            line_len = indent_level * 4
            no_newline = True
            indent_level += 1
            brace_stack[0] += 1
            brace_stack.append((brace_stack[0], True))
            continue
        elif buffer[-1] == "}" and not in_str:
            brace_stack[0] -= 1
            if brace_stack[-1][1]: # If we must print newline and indent
                if not buffer == "}":
                    print(indent_level * tab + buffer[:-1].rstrip("\n"))
                indent_level -= 1
                print(indent_level * tab + "}")
                buffer = ""
                line_len = indent_level * 4
            else:
                pass
            brace_stack.pop()
        line_len += 1

        if line_len == 79 and not in_str:
            print(indent_level * tab + buffer)
            buffer = ""
            line_len = indent_level * 4
            continue
        elif line_len == 78 and in_str:
            print(indent_level * tab + buffer + "\\")
            buffer = ""
            line_len = indent_level * 4
            no_tab = True
            continue

输入示例（将文件名作为参数传递）：

#include <stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n"); //Semicolon added in the string just to annoy you
             /* Now we take the input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
        s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
}}printf("Your name in upper case is:\n%s\n",s);
   return 0;}

输出示例：

#include <stdio.h>
#include<string.h>
int
main()
{
    int i;
    char s[99];
    printf("----------------------\n;;What is your name?;;\n------------------\
----\n"); //Semicolon added in the string just to annoy you
    /* Now we take the input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++)
    {
        if(s[i]>='a'&&s[i]<='z')
        {
            s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
        }
    }
    printf("Your name in upper case is:\n%s\n",s);
    return 0;
}

这将有错误。

。净

使用Visual Studio打开该文件

输入：

#include<stdio.h>
#include<string.h>
int main() {
int i;
char s[99];
     printf("----------------------\n;;What is your name?;;\n----------------------\n\""); //Semicolon added in the {;} string just to annoy you
             /* Now we take the {;} input: */
    scanf("%s",s);
    for(i=0;i<strlen(s);i++){if(s[i]>='a'&&s[i]<='z'){
            s[i]-=('a'-'A'); //this is same as s[i]=s[i]-'a'+'A'
    }
}printf("Your \"name\" in upper case is:\n%s\n",s);
       return 0;}

输出：