Borderou de evaluare (job #443389)

Compilare: user.cpp: In function ‘int main()’: user.cpp:23:9: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] user.cpp:21:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:22:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:24:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:26:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘int rec(int)’: user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type]