Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
    bool tramp[4][13];
    for(int a = 0; a < 4; ++a) {
        for(int b = 0; b < 13; ++b) {
            tramp[a][b] = false;
        }
    }
    
    int N;
    char kind;
    int number,e;

    cin >> N;

    for(int c = 0; c < N; ++c) {
        cin >> kind >> number;
        switch(kind) {
            case "S":
             e = 0;
             break;
            case "H":
             e = 1;
             break;
            case "C":
             e = 2;
             break;
            case "D":
             e = 3;
             break;
        }
        tramp[e][number] = true;
    }

    char kind2;

    for(int f = 0; f < 4; ++f) {
        for(int g = 0; g < 4; ++ g) {
            if(number[f][g] == false) {
                switch(f) {
                    case 0;
                     kind2 = "S";
                     break
                    case 1;
                     kind2 = "H";
                     break;
                    case 2:
                     kind2 = "C";
                     break;
                    case 3;
                     kind2 = "D";
                     break; 
                }
                cout << kind2 << " " << g << endl;
            }
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:18: error: conversion from 'const char*' to 'int' in a converted constant expression
   21 |             case "S":
      |                  ^~~
a.cc:21:18: error: could not convert '"S"' from 'const char [2]' to 'int'
   21 |             case "S":
      |                  ^~~
      |                  |
      |                  const char [2]
a.cc:24:18: error: conversion from 'const char*' to 'int' in a converted constant expression
   24 |             case "H":
      |                  ^~~
a.cc:24:18: error: could not convert '"H"' from 'const char [2]' to 'int'
   24 |             case "H":
      |                  ^~~
      |                  |
      |                  const char [2]
a.cc:27:18: error: conversion from 'const char*' to 'int' in a converted constant expression
   27 |             case "C":
      |                  ^~~
a.cc:27:18: error: could not convert '"C"' from 'const char [2]' to 'int'
   27 |             case "C":
      |                  ^~~
      |                  |
      |                  const char [2]
a.cc:30:18: error: conversion from 'const char*' to 'int' in a converted constant expression
   30 |             case "D":
      |                  ^~~
a.cc:30:18: error: could not convert '"D"' from 'const char [2]' to 'int'
   30 |             case "D":
      |                  ^~~
      |                  |
      |                  const char [2]
a.cc:41:22: error: invalid types 'int[int]' for array subscript
   41 |             if(number[f][g] == false) {
      |                      ^
a.cc:43:27: error: expected ':' before ';' token
   43 |                     case 0;
      |                           ^
      |                           :
a.cc:44:30: error: invalid conversion from 'const char*' to 'char' [-fpermissive]
   44 |                      kind2 = "S";
      |                              ^~~
      |                              |
      |                              const char*
a.cc:45:27: error: expected ';' before 'case'
   45 |                      break
      |                           ^
      |                           ;
   46 |                     case 1;
      |                     ~~~~   
a.cc:46:27: error: expected ':' before ';' token
   46 |                     case 1;
      |                           ^
      |                           :
a.cc:47:30: error: invalid conversion from 'const char*' to 'char' [-fpermissive]
   47 |                      kind2 = "H";
      |                              ^~~
      |                              |
      |                              const char*
a.cc:50:30: error: invalid conversion from 'const char*' to 'char' [-fpermissive]
   50 |                      kind2 = "C";
      |                              ^~~
      |                              |
      |                              const char*
a.cc:52:27: error: expected ':' before ';' token
   52 |                     case 3;
      |                           ^
      |                           :
a.cc:53:30: error: invalid conversion from 'const char*' to 'char' [-fpermissive]
   53 |                      kind2 = "D";
      |                              ^~~
      |                              |
      |                              const char*