View Compilation Error

0_0_25919173_10836.cpp: In function 'int main()':
0_0_25919173_10836.cpp:12:2: error: '_int64' was not declared in this scope
  _int64 f[51];
  ^
0_0_25919173_10836.cpp:13:2: error: 'f' was not declared in this scope
  f[0]=0;
  ^