Compilare: user.cpp: In function ‘int main()’: user.cpp:83:35: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘std::set<int>::size_type {aka long unsigned int}’ [-Wformat=] printf("%d ", prime.size()); ^ user.cpp:43:13: warning: unused variable ‘d’ [-Wunused-variable] int n,i,d,nr; ^ user.cpp:41:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("coduri.in", "r",stdin); ^ user.cpp:42:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coduri.out", "w", stdout); ^ user.cpp:44:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^