Compilare: user.cpp: In function ‘bool compare(char*, char*, int, int)’: user.cpp:26:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < start; i++) ^ user.cpp: In function ‘unsigned int rabin(char*, char*, int*)’: user.cpp:43:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = a; i < b; i++) ^ /tmp/ccA5UL3C.o: In function `main': user.cpp:(.text.startup+0x74): warning: the `gets' function is dangerous and should not be used.