Language: C++

#include<iostream>
using namespace std;

int main(){
?????????  bool cards[4][14]
	int n, rank;
	char suit;

	for(int s=0; s<4; s++){
		for (int r=1; r<14; r++){
			cards[s][r] = 0;
		}
	}

	cin >> n;
	for(int i=0; i<n; i++){
		cin >> suit >> rank;
		if(suit == 'S') cards[0][rank] = 1;
		if(suit == 'H') cards[1][rank] = 1;
		if(suit == 'C') cards[2][rank] = 1;
		if(suit == 'D') cards[3][rank] = 1;
	}

	for(int s=0; s<4; s++){
		for(int r=1; r<14; r++){
			if(cards[s][r]) continue;
			if(s==0) suit = 'S';
			if(s==1) suit = 'H';
			if(s==2) suit = 'C';
			if(s==3) suit = 'D';
			cout << suit << "" << r << endl;
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:1: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      | ^
a.cc:5:2: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |  ^
a.cc:5:3: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |   ^
a.cc:5:4: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |    ^
a.cc:5:5: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |     ^
a.cc:5:6: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |      ^
a.cc:5:7: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |       ^
a.cc:5:8: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |        ^
a.cc:5:9: error: expected primary-expression before '?' token
    5 | ?????????  bool cards[4][14]
      |         ^
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:5:10: error: expected ':' before 'bool'
    5 | ?????????  bool cards[4][14]
      |          ^ ~~~~
      |          :
a.cc:5:12: error: expected primary-expression before 'bool'
    5 | ?????????  bool cards[4][14]
      |            ^~~~
a.cc:11:25: error: 'cards' was not declared in this scope
   11 |                         cards[s][r] = 0;
      |                         ^~~~~
a.cc:15:16: error: 'n' was not declared in this scope
   15 |         cin >> n;
      |                ^
a.cc:17:36: error: missing template arguments before ';' token
   17 |                 cin >> suit >> rank;
      |                                    ^
a.cc:18:33: error: 'cards' was not declared in this scope
   18 |                 if(suit == 'S') cards[0][rank] = 1;
      |                                 ^~~~~
a.cc:18:46: error: missing template arguments before ']' token
   18 |                 if(suit == 'S') cards[0][rank] = 1;
      |                                              ^
a.cc:19:33: error: 'cards' was not declared in this scope
   19 |                 if(suit == 'H') cards[1][rank] = 1;
      |                                 ^~~~~
a.cc:19:46: error: missing template arguments before ']' token
   19 |                 if(suit == 'H') cards[1][rank] = 1;
      |                                              ^
a.cc:20:33: error: 'cards' was not declared in this scope
   20 |                 if(suit == 'C') cards[2][rank] = 1;
      |                                 ^~~~~
a.cc:20:46: error: missing template arguments before ']' token
   20 |                 if(suit == 'C') cards[2][rank] = 1;
      |                                              ^
a.cc:21:33: error: 'cards' was not declared in this scope
   21 |                 if(suit == 'D') cards[3][rank] = 1;
      |                                 ^~~~~
a.cc:21:46: error: missing template arguments before ']' token
   21 |                 if(suit == 'D') cards[3][rank] = 1;
      |                                              ^
a.cc:26:28: error: 'cards' was not declared in this scope
   26 |                         if(cards[s][r]) continue;
      |                            ^~~~~