Compilare: user.cpp: In function ‘int main()’: user.cpp:21:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x<mn1) ^ user.cpp:26:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (x<mn2) ^ user.cpp:28:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (x>mx1) ^ user.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (x>mx2) ^ user.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (x>mx3) ^ user.cpp:10:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("produs4.in","r",stdin); ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("produs4.out","w",stdout); ^ user.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&t); ^ user.cpp:15:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp:20:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&x); ^