foo.cc: In function ‘int main()’:
foo.cc:8:37: warning: ‘ans’ may be used uninitialized [-Wmaybe-uninitialized]
    8 |                 if(!(x % i))    ans += i;
      |                                 ~~~~^~~~
foo.cc:5:16: note: ‘ans’ was declared here
    5 |         int x, ans;
      |                ^~~