Compilare: user.cpp: In function ‘int main()’: user.cpp:45:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] col=l-v[drum[n][l]].lung; ^ user.cpp:49:37: warning: array subscript has type ‘char’ [-Wchar-subscripts] col=col-v[drum[lin][col]].lung; ^ user.cpp:11:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sant.in","r",stdin); ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sant.out","w",stdout); ^ user.cpp:13:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&l,&n,&c); ^ user.cpp:15:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].lung,&v[i].plata); ^