Compilare: user.cpp: In function ‘int main()’: user.cpp:7:24: warning: format ‘%u’ expects a matching ‘unsigned int*’ argument [-Wformat=] scanf("%u%u%u%u",&n), ^ user.cpp:7:24: warning: format ‘%u’ expects a matching ‘unsigned int*’ argument [-Wformat=] user.cpp:7:24: warning: format ‘%u’ expects a matching ‘unsigned int*’ argument [-Wformat=] user.cpp:8:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u%u%u",&a,&b,&c),n-=3; ^ user.cpp:8:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:26:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%u",&x); ^