Compilare: user.cpp: In function ‘void RabinKarp(int)’: user.cpp:17:20: warning: unused variable ‘hash2’ [-Wunused-variable] int hash1 = 0, hash2 = 0 , P1 = 1 , P2 = 1; ^ user.cpp:17:41: warning: unused variable ‘P2’ [-Wunused-variable] int hash1 = 0, hash2 = 0 , P1 = 1 , P2 = 1; ^ user.cpp: In function ‘int main()’: user.cpp:37:43: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[6005]’ [-Wformat=] scanf ("%d %d %s" , &n , &k , &sir + 1); ^ user.cpp:34:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("per.in" , "r" , stdin); ^ user.cpp:35:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("per.out" , "w" , stdout); ^ user.cpp:37:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %s" , &n , &k , &sir + 1); ^