Compilare: user.cpp: In function ‘int main()’: user.cpp:27:16: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 2 has type ‘long long int*’ [-Wformat=] scanf("%ld", &k); ^ user.cpp:30:18: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%ld", x*x); ^ user.cpp:25:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prim.in", "r", stdin); ^ user.cpp:26:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("prim.out", "w", stdout); ^ user.cpp:27:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &k); ^ user.cpp: In function ‘long long int find(long long int)’: user.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type] } ^