foo.cc: In function ‘int main()’:
foo.cc:18:31: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   18 |                 if(a%i==0&&b%i==0&c%i==0){
      |                            ~~~^~~
foo.cc:22:15: warning: ‘ans’ may be used uninitialized [-Wmaybe-uninitialized]
   22 |         cout<<ans<<endl;
      |               ^~~
foo.cc:14:19: note: ‘ans’ was declared here
   14 |         int a,b,c,ans;
      |                   ^~~

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