Compilare: user.cpp: In function ‘void cer_bc()’: user.cpp:22:33: warning: unused variable ‘k’ [-Wunused-variable] long long int a = 1, b = n, k, aux = x, e = 0; ^ user.cpp: In function ‘void read()’: user.cpp:9:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( "pesti.in", "r", stdin ); ^ user.cpp:10:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ( "%lld%lld", &n, &x ); ^ user.cpp: In function ‘void scrie()’: user.cpp:38:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( "pesti.out", "w", stdout ); ^