Compilare: user.cpp: In function ‘int main()’: user.cpp:75:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][0]=k1; ^ user.cpp:76:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][1]=l1; ^ user.cpp:77:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][2]=c1; ^ user.cpp:82:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] int nk=q[p][0]+dir[i][0], nl=q[p][1]+dir[i][1], nc=q[p][2]+dir[i][2]; ^ user.cpp:82:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] int nk=q[p][0]+dir[i][0], nl=q[p][1]+dir[i][1], nc=q[p][2]+dir[i][2]; ^ user.cpp:82:67: warning: array subscript has type ‘char’ [-Wchar-subscripts] int nk=q[p][0]+dir[i][0], nl=q[p][1]+dir[i][1], nc=q[p][2]+dir[i][2]; ^ user.cpp:84:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][0]=nk; ^ user.cpp:85:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][1]=nl; ^ user.cpp:86:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] q[u][2]=nc; ^ user.cpp:88:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp:88:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp:88:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp:88:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp:88:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp:88:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[nk][nl][nc]=d[q[p][0]][q[p][1]][q[p][2]]+1; ^ user.cpp: In function ‘char nextch()’: user.cpp:13:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^