Borderou de evaluare (job #504467)

Compilare: user.cpp: In function 'int main()': user.cpp:32:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] user.cpp:7:21: warning: unused variable 'cn' [-Wunused-variable] user.cpp:5:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]