foo.c: In function 'main':
foo.c:7:9: error: unknown type name 'flout'; did you mean 'float'?
    7 |         flout sum = 0;
      |         ^~~~~
      |         float
foo.c:16:18: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
   16 |         printf("%f\n", sum);
      |                 ~^     ~~~
      |                  |     |
      |                  |     int
      |                  double
      |                 %d

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