foo.cc: In function 'int main()':
foo.cc:7:10: warning: unused variable 't' [-Wunused-variable]
  float h,t;
          ^
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%f %d",&h,&n);
  ~~~~~^~~~~~~~~~~~~~~

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