View Compilation Error

0_0_16832150_19420.cpp: In function 'int main()':
0_0_16832150_19420.cpp:10:5: error: 'int_64' was not declared in this scope
     int_64 A[5];
     ^
0_0_16832150_19420.cpp:15:15: error: 'A' was not declared in this scope
          cin>>A[0]>>A[1]>>A[2]>>A[3];
               ^