Compilare: user.cpp:20:16: warning: multi-character character constant [-Wmultichar] const char b = '10'; ^ user.cpp:21:16: warning: multi-character character constant [-Wmultichar] const char l = '11'; ^ user.cpp:20:16: warning: overflow in implicit constant conversion [-Woverflow] const char b = '10'; ^ user.cpp:21:16: warning: overflow in implicit constant conversion [-Woverflow] const char l = '11'; ^ user.cpp: In function ‘int main()’: user.cpp:83:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&m); ^ user.cpp:85:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(tmp,3,in); ^ user.cpp:88:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v[i],NMAX+3,in); ^