Borderou de evaluare (job #402995)

Compilare: user.cpp: In function 'int main()': user.cpp:10:9: warning: unused variable 'n' [-Wunused-variable] user.cpp:10:11: warning: unused variable 'i' [-Wunused-variable] user.cpp:8:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] user.cpp:13:5: warning: 'c' is used uninitialized in this function [-Wuninitialized]