Compilare: user.cpp: In function ‘int main()’: user.cpp:63:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] c[ sir [ i ][ j ] ] = 1; ^ user.cpp:68:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (c[ ch ]) ^ user.cpp:54:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssdj.in", "r", stdin); ^ user.cpp:55:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssdj.out", "w", stdout); ^ user.cpp:57:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:59:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", sir[i] + 1); ^