Compilare: user.cpp: In function ‘int main()’: user.cpp:15:21: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000002]’ [-Wformat=] scanf ("%s\n",&a); ^ user.cpp:16:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000002]’ [-Wformat=] scanf ("%s",&b); ^ user.cpp:12:38: 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:13:40: 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:15:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s\n",&a); ^ user.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%s",&b); ^