Compilare: user.cpp: In function ‘void preKmp(std::string, int*)’: user.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<x.length()) ^ user.cpp: In function ‘void KMP(std::string, int)’: user.cpp:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<s.length()) ^ user.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=k.length()) ^ user.cpp: In function ‘int main()’: user.cpp:51:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.in","r",stdin); ^ user.cpp:52:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.out","w",stdout); ^