Borderou de evaluare (job #221358)

Compilare: user.cpp: In function ‘int main()’: user.cpp:39:23: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:74:24: warning: NULL used in arithmetic [-Wpointer-arith] user.cpp:11:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]