foo.cc: In function 'int main()':
foo.cc:5:6: error: 'x' was not declared in this scope
    5 |  if (x%2==0)
      |      ^
foo.cc:7:8: error: 'x' was not declared in this scope
    7 |     if(x%2!=0)
      |        ^

[Hydro](https://hydro.ac)提供评测服务