/in/foo.cc: In function 'int main()':
/in/foo.cc:26:3: error: expected ',' or ';' before 'int'
   int s=n-low;
   ^~~
/in/foo.cc:27:27: error: 's' was not declared in this scope
   for(int i = 2; i * i <= s; i++)
                           ^
/in/foo.cc:38:28: error: 's' was not declared in this scope
    cout<<n<<"="<<low<<"+"<<s;
                            ^