View Compilation Error

0_0_37583802_30399.cpp: In function 'int main()':
0_0_37583802_30399.cpp:26:17: error: 'a' was not declared in this scope
              if(a[j]==0)
                 ^
0_0_37583802_30399.cpp:48:17: error: 'a' was not declared in this scope
              if(a[i]==0)
                 ^