Compilare: user.cpp: In function ‘int main()’: user.cpp:30:9: warning: unused variable ‘N’ [-Wunused-variable] int N,K; ^ user.cpp:30:11: warning: unused variable ‘K’ [-Wunused-variable] int N,K; ^ user.cpp:31:9: warning: unused variable ‘n’ [-Wunused-variable] int n, m; ^ user.cpp:31:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m; ^ user.cpp:33:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stirling.in","r",stdin); ^ user.cpp:34:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stirling.out", "w", stdout); ^ user.cpp:37:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:47:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &n, &m); ^