Compilare: user.cpp: In function ‘int32_t main()’: user.cpp:17:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}’ [-Wformat=] scanf("%s %s", a, b); ^ user.cpp:17:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘std::__cxx11::string* {aka std::__cxx11::basic_string<char>*}’ [-Wformat=] user.cpp:45:28: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d ", i); rs--; ^ user.cpp:15:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "rt", stdin); ^ user.cpp:16:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "wt", stdout); ^ user.cpp:17:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %s", a, b); ^