/in/foo.cc: In function 'int main()':
/in/foo.cc:5:13: warning: 'a' is used uninitialized [-Wuninitialized]
    5 |         if(a%5==0&&a%3==0){
      |            ~^~
/in/foo.cc:4:13: note: 'a' was declared here
    4 |         int a;
      |             ^