foo.cc: In function 'int main()':
foo.cc:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   14 |     scanf("%d",&n);//表示总记录数量
      |     ~~~~~^~~~~~~~~
foo.cc:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |         scanf("%d%d%d",&type,&price,&time);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Found 20 testcases.
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