foo.cc: In function 'int main()':
foo.cc:31:24: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
   31 |             printf("%.2f ", i);
      |                     ~~~^    ~
      |                        |    |
      |                        |    int
      |                        double
      |                     %.2d

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