Compilare: user.cpp: In function ‘void sum(char*, char*)’: user.cpp:17:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] char x = (A[i] + B[i] + tr); ^ user.cpp:17:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] char x = (A[i] + B[i] + tr); ^ user.cpp:18:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i] = x % 10; ^ user.cpp:22:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[++A[0]] = 1; ^ user.cpp: In function ‘void dif(char*, char*)’: user.cpp:28:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (i = B[0] + 1;i <= A[0];) B[i++]=0; ^ user.cpp:30:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i] = A[i] - (B[i] + T); ^ user.cpp:30:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i] = A[i] - (B[i] + T); ^ user.cpp:30:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] A[i] = A[i] - (B[i] + T); ^ user.cpp:31:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (A[i] < 0) T = 1; else T = 0; ^ user.cpp:32:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (T) A[i] += 10; ^ user.cpp:34:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!A[A[0]]) A[0]--; ^