Borderou de evaluare (job #69241)

Compilare: user.cpp: In function ‘int main()’: user.cpp:7:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:20: warning: ‘a’ is used uninitialized in this function [-Wuninitialized] user.cpp:10:20: warning: ‘b’ is used uninitialized in this function [-Wuninitialized]