Borderou de evaluare (job #100268)

Compilare: user.cpp: In function ‘int main()’: user.cpp:31:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:62:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:13:42: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] user.cpp:13:44: warning: variable ‘u’ set but not used [-Wunused-but-set-variable] user.cpp:10:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:47:37: warning: ‘poz_u’ may be used uninitialized in this function [-Wuninitialized] user.cpp:47:83: warning: ‘poz_p’ may be used uninitialized in this function [-Wuninitialized]