Borderou de evaluare (job #172894)

Compilare: user.cpp: In function ‘int main()’: user.cpp:13:31: warning: unused variable ‘a’ [-Wunused-variable] user.cpp:13:34: warning: unused variable ‘b’ [-Wunused-variable] user.cpp:13:37: warning: unused variable ‘nr’ [-Wunused-variable] user.cpp:11:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:16:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:19:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]