foo.cc: In function 'int main()':
foo.cc:10:20: warning: format '%f' expects a matching 'double' argument [-Wformat=]
   10 |         printf("%.1f,d")
      |                 ~~~^
      |                    |
      |                    double
foo.cc:10:25: error: expected ';' before 'cout'
   10 |         printf("%.1f,d")
      |                         ^
      |                         ;
   11 |         cout<<d;
      |         ~~~~             

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