Compilare: user.cpp: In function ‘int main()’: user.cpp:15:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[l1][c1][T]+=1; ^ user.cpp:16:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[l1][c2+1][T]-=1; ^ user.cpp:17:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[l2+1][c1][T]-=1; ^ user.cpp:18:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[l2+1][c2+1][T]+=1; ^ user.cpp:6:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rox.in","r",stdin); ^ user.cpp:7:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rox.out","w",stdout); ^ user.cpp:8:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&u); ^ user.cpp:11:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d %c ",&l1,&c1,&l2,&c2,&T); ^ user.cpp:36:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&query) ; ^ user.cpp:39:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^