foo.cc: In function 'int main()':
foo.cc:15:20: warning: too many arguments for format [-Wformat-extra-args]
   printf("Yes\n", n);
                    ^
foo.cc:19:19: warning: too many arguments for format [-Wformat-extra-args]
   printf("No\n", n);
                   ^
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
foo.cc:21:8: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
  system("pause");
  ~~~~~~^~~~~~~~~

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