Compilare: user.cpp: In function ‘bool vezi(char*, char*)’: user.cpp:22:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[x[a]]==0) ^ user.cpp:23:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[x[a]]=x[a]-y[a]; ^ user.cpp:25:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[x[a]]!=x[a]-y[a]) ^ user.cpp: In function ‘int main()’: user.cpp:57:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(q[a])==r) ^