Compilare: user.cpp: In function ‘void prefix()’: user.cpp:21:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < strlen(A); ++i) ^ user.cpp: In function ‘void kmp()’: user.cpp:35:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < strlen(B); ++i) ^ user.cpp:41:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (q == strlen(A) - 1) ^ user.cpp: In function ‘void citire()’: user.cpp:14:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", A + 1); ^ user.cpp:15:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", B + 1); ^ user.cpp: In function ‘int main()’: user.cpp:60:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "r", stdin); ^ user.cpp:61:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^