View Compilation Error

0_0_35828550_8930.cpp: In function 'int main()':
0_0_35828550_8930.cpp:5:2: error: '_int64' was not declared in this scope
  _int64 s;
  ^
0_0_35828550_8930.cpp:11:4: error: 's' was not declared in this scope
    s=0;
    ^