foo.cc: In function 'int main()':
foo.cc:13:7: error: 'i' was not declared in this scope
  for (i = xmin; i < xmax+1; i++)
       ^
foo.cc:24:7: error: 'i' was not declared in this scope
  for (i = 0; i < 10; i++)
       ^
foo.cc:5:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &xmin);
  ~~~~~^~~~~~~~~~~~~
foo.cc:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &xmax);
  ~~~~~^~~~~~~~~~~~~

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