Language: C++

#include<math.h>
#include<stdio.h>
#include<utility>
#include<algorithm>

int main() {
	int a, b, c, ??????;
	int d = 0;

	scanf("%d %d %d" , &a, &b, &c);//////////////////////
	
while (d == 0) {
		if (a > b) {
			?????? = a;
			a = b;
			b = ??????;
		}
		if (b > c) {
			?????? = b;
			b = c;
			c = ??????;
			}
		if (a < b) {
			if (b < c) {
				d = 1;
			}
		}
	}
printf("%d %d %d\n", a, b, c);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: expected unqualified-id before '?' token
    7 |         int a, b, c, ??????;
      |                      ^
a.cc:14:25: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                         ^
a.cc:14:26: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                          ^
a.cc:14:27: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                           ^
a.cc:14:28: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                            ^
a.cc:14:29: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                             ^
a.cc:14:30: error: expected primary-expression before '?' token
   14 |                         ?????? = a;
      |                              ^
a.cc:14:32: error: expected primary-expression before '=' token
   14 |                         ?????? = a;
      |                                ^
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:14:35: error: expected ':' before ';' token
   14 |                         ?????? = a;
      |                                   ^
      |                                   :
a.cc:14:35: error: expected primary-expression before ';' token
a.cc:16:29: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                             ^
a.cc:16:30: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                              ^
a.cc:16:31: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                               ^
a.cc:16:32: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                                ^
a.cc:16:33: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                                 ^
a.cc:16:34: error: expected primary-expression before '?' token
   16 |                         b = ??????;
      |                                  ^
a.cc:16:35: error: expected primary-expression before ';' token
   16 |                         b = ??????;
      |                                   ^
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:16:35: error: expected ':' before ';' token
   16 |                         b = ??????;
      |                                   ^
      |                                   :
a.cc:16:35: error: expected primary-expression before ';' token
a.cc:19:25: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                         ^
a.cc:19:26: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                          ^
a.cc:19:27: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                           ^
a.cc:19:28: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                            ^
a.cc:19:29: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                             ^
a.cc:19:30: error: expected primary-expression before '?' token
   19 |                         ?????? = b;
      |                              ^
a.cc:19:32: error: expected primary-expression before '=' token
   19 |                         ?????? = b;
      |                                ^
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:19:35: error: expected ':' before ';' token
   19 |                         ?????? = b;
      |                                   ^
      |                                   :
a.cc:19:35: error: expected primary-expression before ';' token
a.cc:21:29: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                             ^
a.cc:21:30: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                              ^
a.cc:21:31: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                               ^
a.cc:21:32: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                                ^
a.cc:21:33: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                                 ^
a.cc:21:34: error: expected primary-expression before '?' token
   21 |                         c = ??????;
      |                                  ^
a.cc:21:35: error: expected primary-expression before ';' token
   21 |                         c = ??????;
      |                                   ^
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token
a.cc:21:35: error: expected ':' before ';' token
   21 |                         c = ??????;
      |                                   ^
      |                                   :
a.cc:21:35: error: expected primary-expression before ';' token