Compilare: user.cpp: In function ‘int main()’: user.cpp:25:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < strlen(sir1); j++) ^ user.cpp:26:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] frecv1[sir1[j]]++; ^ user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < strlen(sir2); j++) ^ user.cpp:28:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] frecv2[sir2[j]]++; ^ user.cpp:33:16: warning: array subscript is above array bounds [-Warray-bounds] if (frecv1[j] != frecv2[j]) ^ user.cpp:33:29: warning: array subscript is above array bounds [-Warray-bounds] if (frecv1[j] != frecv2[j]) ^