View Compilation Error

0_0_39586082_8978.cpp: In function 'int main()':
0_0_39586082_8978.cpp:23:9: error: 'a' was not declared in this scope
   23 |         a[i]=ans;
      |         ^
0_0_39586082_8978.cpp:27:15: error: 'a' was not declared in this scope
   27 |         cout<<a[n]<<endl;
      |               ^