View Compilation Error

0_0_23264933_14567.cpp: In function 'int main()':
0_0_23264933_14567.cpp:4:2: error: '_int64' was not declared in this scope
  _int64 x[51]={0,1};
  ^
0_0_23264933_14567.cpp:7:3: error: 'x' was not declared in this scope
   x[y]=x[y-1]+x[y-2];
   ^
0_0_23264933_14567.cpp:9:3: error: expected ')' before 'printf'
   printf("%I64d\n",a[y]);
   ^
0_0_23264933_14567.cpp:9:20: error: 'a' was not declared in this scope
   printf("%I64d\n",a[y]);
                    ^