Compilare: user.cpp: In function ‘int main()’: user.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (zile<nrzile) ~~~~^~~~~~~ user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("transport.in","r",stdin); ^ user.cpp:8:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("transport.out","w",stdout); ^