View Compilation Error

0_0_32303774_16712.cpp: In function 'int main()':
0_0_32303774_16712.cpp:9:2: error: '_int64' was not declared in this scope
  _int64 arr[1000],s,k;
  ^
0_0_32303774_16712.cpp:12:3: error: 'k' was not declared in this scope
   k=0;
   ^
0_0_32303774_16712.cpp:20:4: error: 's' was not declared in this scope
    s=0;
    ^
0_0_32303774_16712.cpp:25:4: error: 'arr' was not declared in this scope
    arr[k++]=s;
    ^
0_0_32303774_16712.cpp:28:8: error: 'arr' was not declared in this scope
   sort(arr,arr+k);
        ^