Compilare: user.cpp: In function ‘void KMP(char*, int*)’: user.cpp:11:25: 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(pi, 0, sizeof(pi)); ^ /tmp/ccM61l6V.o: In function `main': user.cpp:(.text.startup+0x87): warning: the `gets' function is dangerous and should not be used.