Compilare: user.cpp: In function ‘int main()’: user.cpp:13:20: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘int’ [-Wformat=] scanf("%d\n", n); ^ user.cpp:16:31: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘char*’ [-Wformat=] scanf("%d ", &a[i]); ^ user.cpp:17:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr[a[i]]=1; ^ user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere5.in","r",stdin); ^ user.cpp:13:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", n); ^ user.cpp:16:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &a[i]); ^ user.cpp:13:21: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] scanf("%d\n", n); ^