foo.cc: In function 'int main()':
foo.cc:19:11: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[21]' [-Wformat=]
   19 |   scanf("%s%d%d%s%s%d",&stu[i].name,&stu[i].end_score,&stu[i].class_score,leade,wester,&stu[i].passage);
      |          ~^            ~~~~~~~~~~~~
      |           |            |
      |           char*        char (*)[21]
foo.cc:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |   scanf("%s%d%d%s%s%d",&stu[i].name,&stu[i].end_score,&stu[i].class_score,leade,wester,&stu[i].passage);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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