foo.cc: In function 'int main()':
foo.cc:106:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  106 |         scanf("%lf%lf",&a[i].x,&a[i].y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:109:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  109 |         scanf("%lf%lf",&b[i].x,&b[i].y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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