Compilare: user.cpp: In function ‘int main()’: user.cpp:23:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] C[s[i]]++; ^ user.cpp:24:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i]=C[s[i]]; ^ user.cpp:30:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] C[s[i]]++; ^ user.cpp:31:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i]=C[s[i]]; ^ user.cpp:68:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] t=C[r]; ^ user.cpp:69:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] l=C[inv(r)]; ^ user.cpp:68:14: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] t=C[r]; ^