Compilare: user.cpp: In function ‘int main()’: user.cpp:50:7: warning: unused variable ‘div’ [-Wunused-variable] int div = 6; ^ user.cpp:45:27: warning: variable ‘sum’ set but not used [-Wunused-but-set-variable] unsigned long long int n,sum,partial,partial2; ^ user.cpp:45:31: warning: unused variable ‘partial’ [-Wunused-variable] unsigned long long int n,sum,partial,partial2; ^ user.cpp:45:39: warning: unused variable ‘partial2’ [-Wunused-variable] unsigned long long int n,sum,partial,partial2; ^ user.cpp:38:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.in","r",stdin); ^ user.cpp:39:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("quadratum.out","w",stdout); ^ user.cpp:43:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^ user.cpp:55:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^