Language: C++

#include <iostream>
#include <string>
using namespace std;

#define ??????????????£?????? 114514

string pairs[2][3] = { {"null","one pair","two pair"},
					  {"three card","full house",""} };

int main() {
	int n, c, three, two;
	char t;
	string res;
	while (!cin.eof()) {
		int card[13] = { 0 }, c = 0, three = 0, two = 0;
		for (int i = 0; i < 4; i++) {
			cin >> n >> t;
			card[n - 1]++;
		}
		cin >> n;
		card[n - 1]++;

		for (int i = 0; i < 13; i++) {
			if (card[i] == 4) {
				c = ??????????????£??????;
				break;
			} else if(card[i] == 3) {
				three++;
			} else if(card[i] == 2) {
				two++;
			}

			if (card[i] == 1) {
				c++;

				if (c == 4 && i == 12 && card[0] == 1) {
					c = 5;
					break;
				}
			} else if(card[i] == 0 && c != 5 && c > 0) {
				c = 0;
			}
		}
		if (c == 5) {
			cout << "straight" << endl;
			continue;
		}

		if (c == ??????????????£??????) {
			cout << "four card" << endl;
			continue;
		}

		cout << pairs[three][two] << endl;
	}

	return 0;
}

Compiler output:
a.cc:5:9: error: macro names must be identifiers
    5 | #define ??????????????£?????? 114514
      |         ^
a.cc:5:23: error: extended character £ is not valid in an identifier
    5 | #define ??????????????£?????? 114514
      |                       ^
a.cc:25:51: error: extended character £ is not valid in an identifier
   25 |                                 c = ??????????????£??????;
      |                                                   ^
a.cc:49:40: error: extended character £ is not valid in an identifier
   49 |                 if (c == ??????????????£??????) {
      |                                        ^
a.cc:49:45: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
   49 |                 if (c == ??????????????£??????) {
a.cc: In function 'int main()':
a.cc:25:37: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                     ^
a.cc:25:38: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                      ^
a.cc:25:39: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                       ^
a.cc:25:40: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                        ^
a.cc:25:41: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                         ^
a.cc:25:42: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                          ^
a.cc:25:43: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                           ^
a.cc:25:44: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                            ^
a.cc:25:45: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                             ^
a.cc:25:46: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                              ^
a.cc:25:47: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                               ^
a.cc:25:48: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                ^
a.cc:25:49: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                 ^
a.cc:25:50: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                  ^
a.cc:25:51: error: '\U000000a3' was not declared in this scope
   25 |                                 c = ??????????????£??????;
      |                                                   ^
a.cc:25:53: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                     ^
a.cc:25:54: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                      ^
a.cc:25:55: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                       ^
a.cc:25:56: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                        ^
a.cc:25:57: error: expected primary-expression before '?' token
   25 |                                 c = ??????????????£??????;
      |                                                         ^
a.cc:25:58: error: expected primary-expression before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;
      |                                                          ^
      |                                                          :
a.cc:25:58: error: expected primary-expression before ';' token
a.cc:25:58: error: expected ':' before ';' token
   25 |                                 c = ??????????????£??????;