Borderou de evaluare (job #158298)

Compilare: user.cpp: In function ‘int main()’: user.cpp:6:21: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] user.cpp:6:23: warning: variable ‘b’ set but not used [-Wunused-but-set-variable] user.cpp:6:25: warning: unused variable ‘nr’ [-Wunused-variable] user.cpp:6:31: warning: unused variable ‘r’ [-Wunused-variable] user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:9:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]