Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:15:35: error: ‘a’ was not declared in this scope for(int i=1;i<=n;i++) scanf("%d",&a[i]); ^ user.cpp:16:6: error: ‘a’ was not declared in this scope sort(a+1,a+n+1,comp); ^ user.cpp:12:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("algsort.in","r",stdin); ^ user.cpp:13:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("algsort.out","w",stdout); ^ user.cpp:14:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^