Compilare: user.cpp: In function ‘void fromBinary(int*, std::string&)’: user.cpp:102:21: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(A, 0, sizeof(A)); ^ user.cpp:103:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < S.length(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:155:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < X.length() && i < Y.length(); i++) ^ user.cpp:155:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < X.length() && i < Y.length(); i++) ^ user.cpp:166:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < X.length() && i < Y.length()) ^ user.cpp:166:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < X.length() && i < Y.length()) ^