Compilare: user.cpp: In function ‘void AddtoGroup(int)’: user.cpp:15:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(mat[i][mat[0][j]] == 1) // if has a flower alike the group ^ user.cpp:23:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] mat[i][mat[0][j]] = 1; ^ user.cpp:31:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] mat[nrg][mat[0][j]] = 1; ^ user.cpp: In function ‘int main()’: user.cpp:44:32: warning: format ‘%hd’ expects argument of type ‘short int*’, but argument 2 has type ‘char*’ [-Wformat=] scanf("%hd",&mat[0][j]); ^