Compilare: user.cpp: In function ‘int main()’: user.cpp:25:14: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[30000042]’ [-Wformat=] scanf("%s",&a); ^ user.cpp:26:14: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[3000042]’ [-Wformat=] scanf("%s",&b); ^ user.cpp:22:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("password1.in","r",stdin); ^ user.cpp:23:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("password1.out","w",stdout); ^ user.cpp:25:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&a); ^ user.cpp:26:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&b); ^