Compilare: user.cpp: In function ‘int codePair(char, char)’: user.cpp:19:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] return cpair[a][b]; ^ user.cpp:19:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] return cpair[a][b]; ^ user.cpp: In function ‘int main()’: user.cpp:61:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] cpair[a][b] = ++ n; ^ user.cpp:61:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] cpair[a][b] = ++ n; ^ user.cpp:53:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teroristi.in", "r", stdin); ^ user.cpp:54:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teroristi.out", "w", stdout); ^ user.cpp:63:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:64:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", txt); ^ user.cpp:67:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c %c\n", &a, &b); ^