Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:8:34: error: ‘a’ was not declared in this scope scanf("%lld%lld%lld%lld",&n,&a,&b,&c); ^ user.cpp:8:37: error: ‘b’ was not declared in this scope scanf("%lld%lld%lld%lld",&n,&a,&b,&c); ^ user.cpp:8:40: error: ‘c’ was not declared in this scope scanf("%lld%lld%lld%lld",&n,&a,&b,&c); ^ user.cpp:6:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in","r",stdin); ^ user.cpp:7:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out","w",stdout); ^