/in/foo.cc: In function 'int main()':
/in/foo.cc:19:10: error: 'i' was not declared in this scope
   if(num%i==0)
          ^
/in/foo.cc:27:6: error: redeclaration of 'int temp'
  int temp=0;
      ^~~~
/in/foo.cc:16:6: note: 'int temp' previously declared here
  int temp=0;
      ^~~~