Borderou de evaluare (job #305194)

Compilare: user.cpp: In function ‘int main()’: user.cpp:9:21: warning: variable ‘j’ set but not used [-Wunused-but-set-variable] user.cpp:9:23: warning: variable ‘r’ set but not used [-Wunused-but-set-variable] user.cpp:9:25: warning: unused variable ‘per’ [-Wunused-variable] user.cpp:7:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]