Compilare: user.c: In function ‘main’: user.c:62:42: warning: operation on ‘pos’ may be undefined [-Wsequence-point] fprintf(stdout, "%s%s\n", s, p + ((pos = kmp()) >> (pos == N))); ^ user.c:55:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(stdin, "%s", s); ^ user.c:61:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("palindrom.out", "w", stdout); ^