Compilare: user.cpp: In function ‘int main()’: user.cpp:16:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000000]’ [-Wformat=] scanf("%s%s" , &s1, &s2); ^ user.cpp:16:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000000]’ [-Wformat=] user.cpp:12:41: 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:13:43: 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); ^ user.cpp:16:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%s" , &s1, &s2); ^