Borderou de evaluare (job #363197)

Compilare: user.cpp: In function ‘int main()’: user.cpp:40:9: warning: unused variable ‘M’ [-Wunused-variable] user.cpp:40:36: warning: unused variable ‘i’ [-Wunused-variable] user.cpp:11:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]