Compilare: user.cpp: In function ‘int main()’: user.cpp:61:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] bad[a][b] = bad[b][a] = true; ^ user.cpp:61:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] bad[a][b] = bad[b][a] = true; ^ user.cpp:61:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] bad[a][b] = bad[b][a] = true; ^ user.cpp:61:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] bad[a][b] = bad[b][a] = true; ^ user.cpp:65:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (!bad[a][s[i]]) { ^ user.cpp:70:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (!bad[b][s[i]]) { ^ user.cpp: In function ‘char Advance()’: user.cpp:27:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:53:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("farmerj.in", "r", stdin); ^ user.cpp:54:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("farmerj.out", "w", stdout); ^ user.cpp:56:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%d\n", s + 1, &m); ^ user.cpp:60:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c%c\n", &a, &b); ^